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Firefox's "Web Content" processes hits 100% CPU usage when Google Chrome is running

(core :: widget: gtk, defect), (reporter: jerome.auge, unassigned).

web content 100 cpu

Waking up an old thread.

For the last couple of days, Firefox on my laptop too has started consuming too much RAM. Firefox is running continuously on my laptop from 9am to about 1am the following day. Last night around 1 am, I noticed that my Firefox froze and no window was responding. Seconds later, my laptop froze I was getting bare minimal response. After opening the process monitor, I found that a web-content process of Firefox was consuming 5GBs of my 8GB ram! I killed the process and restarted Firefox and things became normal.

Some time later, I again noticed that a web-content process of Firefox was consuming 1GB of RAM and the consumption was rising very fast. In about half a minute, that increased to 2.3GB!

What could be the bug and how can I fix it?

I'm also experiencing this problem just like byatin2005. I will try looking up how to run "strace" next time this happens.

Oh, I should mention: list of my addons is Better Tweetdeck, BFA (Better FurAffinity), Checkmarks, Download All Images, Enhancer for YouTube, Facebook Container, FurAffinity Extender, HTTPS Everywhere, Image Search Options, Imagus, Limit Tabs, Twitter Container and Reimagined Twitter, Terms of Service Didn't Read, uBlock Origin, User Agent Switcher, Video Download Helper, View Image, View Image Resurrected and WebP Image Converter. I'm running Firefox 87.0 64bit on Ubuntu 20.04.2 LTS, also 64 bit. Also this seems to mostly happen on Twitter, I tried disabling Twitter related extensions (container and reimagined) and we will see if it will still occur.

Also I have no way to know if this happens on Nightly because to be blunt, I never managed to succesfully compile a program from source.

(In reply to nobody.shinobi from comment #16 )

Same problem for me running FF89.0 over Ubuntu Mate 20.04.02 LTS (Focal Fossa), kernel 5.4.0-74-generic x86_64 on my brand new laptop with i5 10th gen. The same: with few FF tabs web content was draining all my CPU blood. When not freezing, a plain kill of web content or firefox solved the problem until re-opening of few tabs.

Accordingly with the observation of @Jerome.auge I try to solve it by simply removing that NOTO fonts. And IT WORKED! I've installed font-manager, searched NOTO, ticks from all noto fonts and sizes removed and voila... I've tested the system allowing everything in popblocker, and opening many FF tabs, tabs with heavy scripts, simultaneously with chrome, with gmail, etc., and resist everything. I'm not programmer so, please try and report if it works for you, but seems to that this SOLVES the issue. Credits for @jerome.auge

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Debugging high (near total) CPU/memory usage of "Web Content" application on Linux Mint

I have Linux Mint installed on 3 computers at home, and all of them are almost unusably slow whenever Firefox is open. Here is the output from top :

top output while running Web Content

As you can see, "Web Content" and Firefox are collectively using up nearly all of my CPU, and more than 50% (4GB+) of system memory.

I have never had this problem in the past with Debian or Ubuntu, but it is occuring on every computer I've installed Mint on so far. This extremely high (near total) CPU/memory usage is constant, and is rendering my computer unusable.

Does anyone have ideas about how to fix this? If there is no fix, how can I keep this "Web Content" application from running at all?

J. Taylor's user avatar

5 Answers 5

this is a common problem causing nothing but the battery wasted energy decreasing unplugged operation time significantly.

the cause of the problem appears to be very simple: you may have too many tabs opened each having bulky and useless endless loops running java-scripts .

those java-scripts are usually not origin of the web site you are working with but an ad based 3rd parties from somewhere else trying to collect some info from your FFox session or just to display switching ads on a side.

the simple (but not unique) solution would be to install NoScript plugin - causing immediate effect - Web Content process CPU consumtion will decrease almost to 0% .

so keep NoScript installed on all your FFox'es and keep track on what domain you are actually allowing scripts from to be executed very carefully.

it's a good practice to allow only original domain scripts for permanent (a choice " allow ") to have the web site you are visiting to display correctly all the useful information, but to keep side or extra domains only in " forbid " or " temporary allow " mode so the next FFox load will keep all these unwelcome scripts banned again.

Oleg Kokorin's user avatar

I just had this problem with the "new" Firefox. The process was consuming 2.4 GB on a 4 GB machine with only one tab open. Disabling the Ghostery plugin solved the issue for me.

Eric's user avatar

I looks like you have some problematic Firefox plugins or extension installed? Try disabling any/all extensions and see if that resolves the issue.

Edit*: Check this link for further info - looks to be flash related: https://forums.linuxmint.com/viewtopic.php?t=231186

Hexdump's user avatar

I had the same problem and tried to close one by one the opened tabs, to locate the one that relies heavily on Web Content process. It turned out that ebay utilize about 20-30% of my cpu, depending on your machine, this percentage can potentially be lower or higher.

Curious_Dim's user avatar

I have a new update for this question:

With Firefox 75 (64 b) on Linux Mint 19 (Cin version 3.8.9) I installed NoScript a couple of days ago and then I had a WebContent upcoming and heating up my computer.

Contrary to what Oleg Kokorin posted I had to uninstall NoScript to recover Firefox with normal behavior. The only othe plugin I have is AddBlockPlus which I kept and is working fine for years.

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Mail Web Content is using 100% of CPU

This morning I noticed that my iMac's fan was running for no reason. I opened Activity Monitor and found Mail Web Content to use 100% of one CPU core (Contenu web Mail in French). It continues to do so right now. It has been doing so for several hours. The Apple Mail application is open. Seeing a previous thread with similar question - there is one email with a big Pdf attachment in the inbox.

Apple, this surely is a bug. Could you fix it?

Closing Mail seems to solve the problem. I'm trying to see if reopening Mail causes the problem to reappear.


iMac 27" late 2015 with 4 GHz Intel i7 quad core

16 GB RAM, factory-installed

Running Mac OS Big Sur 11.1, no update available as of 26 January 2021

web content 100 cpu

Posted on Jan 26, 2021 6:40 AM

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High CPU usage from FirefoxCP Web Content process

web content 100 cpu

Whenever I interact with basically any web page the CPU usage of FirefoxCP Web Content shoots up to a minimum of 30% and I've seen it go as high as 120% (??). I'm on macOS version 10.15.6 on a 2015 macbook pro. I tried to completely reinstal firefox including deleting my profile and the problem persists. I've also ran firefox with all addons disabled and the problem persists. Here is my about:support

Name: Firefox Version: 79.0 Build ID: 20200720193547 Distribution ID: Update Channel: beta User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:79.0) Gecko/20100101 Firefox/79.0 OS: Darwin 19.6.0 Darwin Kernel Version 19.6.0: Sun Jul 5 00:43:10 PDT 2020; root:xnu-6153.141.1~9/RELEASE_X86_64 Multiprocess Windows: 1/1 Enabled by default Remote Processes: 6 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: false

Name: DoH Roll-Out Version: 1.3.0 ID: [email protected]

Name: Firefox Screenshots Version: 39.0.0 ID: [email protected]

Name: Form Autofill Version: 1.0 ID: [email protected]

Name: Web Compat Version: 12.0.0 ID: [email protected]

Name: WebCompat Reporter Version: 1.3.0 ID: [email protected]

Type: Web Content Count: 3 / 8

Type: Privileged About Count: 1

Type: Extension Count: 1

Type: Preallocated Count: 1

Name: Amazon.co.uk Type: extension Version: 1.1 Enabled: true ID: [email protected]

Name: BetterTTV Type: extension Version: 7.2.84 Enabled: true ID: [email protected]

Name: Bing Type: extension Version: 1.1 Enabled: true ID: [email protected]

Name: DuckDuckGo Type: extension Version: 1.0 Enabled: true ID: [email protected]

Name: eBay Type: extension Version: 1.1 Enabled: true ID: [email protected]

Name: Facebook Container Type: extension Version: 2.1.1 Enabled: true ID: @contain-facebook

Name: Google Type: extension Version: 1.0 Enabled: true ID: [email protected]

Name: Honey Type: extension Version: 12.1.1 Enabled: true ID: [email protected]

Name: Reddit Enhancement Suite Type: extension Version: 5.20.2 Enabled: true ID: [email protected]

Name: Thumbnail Rating Bar for YouTube™ Type: extension Version: 1.0.0 Enabled: true ID: {75ae8986-4c3e-4a52-a256-f8496f6a1fa8}

Name: uBlock Origin Type: extension Version: 1.28.4 Enabled: true ID: [email protected]

Name: Wikipedia (en) Type: extension Version: 1.0 Enabled: true ID: [email protected]

Features Compositing: OpenGL Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled WebGL 1 Driver WSI Info: CGL WebGL 1 Driver Renderer: Intel Inc. -- Intel Iris Pro OpenGL Engine WebGL 1 Driver Version: 4.1 INTEL-14.7.8 WebGL 1 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_float_blend EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_element_index_uint OES_fbo_render_mipmap OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context WebGL 2 Driver WSI Info: CGL WebGL 2 Driver Renderer: Intel Inc. -- Intel Iris Pro OpenGL Engine WebGL 2 Driver Version: 4.1 INTEL-14.7.8 WebGL 2 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier WebGL 2 Extensions: EXT_color_buffer_float EXT_float_blend EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context Uses Tiling: true Uses Tiling (Content): true Off Main Thread Painting Enabled: true Off Main Thread Painting Worker Count: 4 Target Frame Rate: 60 GPU #1 Active: Yes Vendor ID: 0x8086 Device ID: 0x0d26 RAM: 0


Audio Backend: audiounit-rust Max Channels: 2 Preferred Sample Rate: 44100 Roundtrip latency (standard deviation): 9.89ms (0.01) Output Devices Name: Group Headphones: builtin-external-mic|hdpn Input Devices Name: Group External Microphone: builtin-external-mic|hdpn

Enumerate database

AVIF (image.avif.enabled): false CSS Masonry Layout (layout.css.grid-template-masonry-value.enabled): false WebGPU (dom.webgpu.enabled): false

browser.cache.disk.amount_written: 1621717 browser.cache.disk.capacity: 1048576 browser.cache.disk.filesystem_reported: 1 browser.contentblocking.category: custom browser.search.region: CA browser.sessionstore.upgradeBackup.latestBuildID: 20200720193547 browser.startup.homepage_override.buildID: 20200720193547 browser.startup.homepage_override.mstone: 79.0 browser.tabs.warnOnClose: false browser.urlbar.matchBuckets: general:5,suggestion:Infinity browser.urlbar.placeholderName: Google browser.urlbar.placeholderName.private: Google browser.urlbar.suggest.bookmark: false browser.urlbar.suggest.openpage: false browser.urlbar.tipShownCount.searchTip_onboard: 4 browser.urlbar.tipShownCount.searchTip_redirect: 1 dom.push.userAgentID: 6abf0a8a83394378a833374c2f0d5606 extensions.lastAppVersion: 79.0 idle.lastDailyNotification: 1595450032 media.gmp-gmpopenh264.abi: x86_64-gcc3 media.gmp-gmpopenh264.lastUpdate: 1593833665 media.gmp-gmpopenh264.version: media.gmp-manager.buildID: 20200720193547 media.gmp-manager.lastCheck: 1595445349 media.gmp-widevinecdm.abi: x86_64-gcc3 media.gmp-widevinecdm.lastUpdate: 1593833665 media.gmp-widevinecdm.version: 4.10.1582.2 media.gmp.storage.version.observed: 1 network.dns.disablePrefetch: true network.http.speculative-parallel-limit: 0 network.predictor.enabled: false network.prefetch-next: false places.database.lastMaintenance: 1595361805 places.history.expiration.transient_current_max_pages: 146723 plugin.flash.arch: x86_64-gcc3 plugin.flash.blockliststate: 0 plugin.flash.desc: Shockwave Flash 32.0 r0 plugin.flash.lastmod_hi: 371 plugin.flash.lastmod_lo: 1318201905 plugin.flash.path: /Library/Internet Plug-Ins/Flash Player.plugin plugin.flash.version: privacy.purge_trackers.date_in_cookie_database: 0 privacy.purge_trackers.last_purge: 1594581539943 privacy.sanitize.pending: [{"id":"newtab-container","itemsToClear":[],"options":{}}] privacy.trackingprotection.enabled: true privacy.userContext.enabled: true privacy.userContext.extension: @contain-facebook privacy.userContext.ui.enabled: true security.remote_settings.crlite_filters.checked: 1594941382 security.remote_settings.intermediates.checked: 1594782989 security.sandbox.content.tempDirSuffix: 5aaa88af-e2ae-ed4f-8bba-fa17ffbf0b4f security.sandbox.plugin.tempDirSuffix: 5e87a987-81cc-fc4f-aa57-074f5d9aa6eb services.sync.declinedEngines: services.sync.engine.bookmarks.validation.lastTime: 1594651401 services.sync.engine.passwords.validation.lastTime: 1594651401 services.sync.engine.prefs.modified: false services.sync.lastPing: 1595431520 services.sync.lastSync: Wed Jul 22 2020 15:54:45 GMT-0500 (Central Daylight Time) signon.importedFromSqlite: true signon.rememberSignons: false storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1593872681

dom.ipc.processCount.webIsolated: 1 fission.autostart: false

Activated: false Prevent Accessibility: 0

NSPR Expected minimum version: 4.26 Version in use: 4.26

NSS Expected minimum version: 3.54 Version in use: 3.54

NSSSMIME Expected minimum version: 3.54 Version in use: 3.54

NSSSSL Expected minimum version: 3.54 Version in use: 3.54

NSSUTIL Expected minimum version: 3.54 Version in use: 3.54

Content Process Sandbox Level: 3 Effective Content Process Sandbox Level: 3

Disk Cache Path: /Users/Julien/Library/Caches/Firefox/Profiles/b0mukqc0.Julien/startupCache/startupCache.8.little Ignore Disk Cache: false Found Disk Cache on Init: true Wrote to Disk Cache: false

Application Settings Requested Locales: ["en-CA"] Available Locales: ["en-CA","en-US"] App Locales: ["en-CA","en-US"] Regional Preferences: ["en-CA"] Default Locale: "en-CA" Operating System System Locales: ["en-CA"] Regional Preferences: ["en-CA"]

' src=

Same situation, some pages like paypal is not loading for me

Im getting the same thing, especially for youtube - i turned off enhanced tracking and my firefox cpu usage dropped dramatically so i think that may be the root of the problem. Im not sure though, hopefully this post gains some traction and someone with more insight can help out. The CPU usage for me spikes to around 90% and my CPU temps spike from an idle 50 degrees C to around 70-80 degrees C

i know this is old but i've been having this problem too. i made tracking "custom" and unchecked all the boxes and that does seem to make a big difference - but i couldn't find a way to turn enhanced tracking off completely. is there one that you've found?

Just leaving my comment here so I can possibly find it later; I think I have some of the same issues sometimes.

Also, why would fission.autostart be set to "false" and that option be "locked"? Fission is a pretty much all-around Good Thing right?.... so wouldn't we want it to always autostart so it's on all the time?

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Is Your Browser Using Too Much CPU?→ Fix to Make It Use Less

Ending the process is the quickest solution to high cpu usage.

Aleksandar Ognjanovic

web content 100 cpu

High CPU usage when browsing the internet is nothing strange in the current state of online multimedia presentation. All mainstream browsers are pretty demanding, and if you have a lackluster configuration, there’s a good chance that the CPU will hit sky-high levels.

Nonetheless, sometimes the core of the problem isn’t your overwhelmed CPU or underperforming GPU, but rather internal issues that are more browser-related.

In order to avoid seeing high CPU activity inflicted by your browser of choice, make sure to check the solutions we provided below. They should help you overcome the issue or, at least, subdue it for the time being.

Why is browser taking up so much CPU?

How do I lower my CPU usage?

Later in this article, we will discuss fixing high CPU usage, but here are a few things you may do to lower your CPU usage:

Before going through all the solutions, let’s focus on a browser that can fix high CPU usage within seconds.

With its features and continuous updates, Opera GX minimizes RAM and battery usage to improve your online experience.

web content 100 cpu

How do I fix my CPU usage on my browser?

1. disable add-ons, 1.1 how to disable add-ons in opera.

high cpu when browsing internet

Opera made a lot of exquisite improvements over time, and it’s the force to be reckoned with in the browser market.

It’s more than a viable solution because of the integrated VPN and AdBlocker, a well-designed interface, and optimized browsing for slow connections.

Besides this, features like the Speed Dial, keyboard shortcuts, and delaying loading of background tabs enhance the experience and the CPU usage.

Expert tip:

Some PC issues are hard to tackle, especially when it comes to corrupted repositories or missing Windows files. If you are having troubles fixing an error, your system may be partially broken. We recommend installing Restoro, a tool that will scan your machine and identify what the fault is. Click here  to download and start repairing.

Opera is a better-suited solution than the others available on the market, and the extra features incorporated in the browser make it much more worthwhile.

web content 100 cpu

1.2 How to disable add-ons in Chrome

high cpu when browsing internet

Now you should verify if you are still experiencing high CPU when browsing the internet.

2. Delete cache and cookies

2.1 how to delete opera data.

high cpu when browsing internet

2.2 How to delete Chrome data

high cpu when browsing internet

Once again, you should note that for most browsers, the process of clearing cache data will be very similar to Chrome and Opera.

How to Run Java Applet Program in Web Browser in 4 Ways

Firefox not working on windows 10: 8 fixes if it won’t open, netflix low quality on chrome: improve it with these 4 fixes, microsoft edge flickering on windows: fixed, chrome //net-internals/#dns mobile [what is it], 3. end the browser process.

web content 100 cpu

If you notice browser high CPU usage on startup, you should try forcing the task to end and verify if you are still experiencing high CPU when browsing the internet.

4. Disable Hardware Acceleration

web content 100 cpu

Does CPU affect Web browsing?

Your programs can process information more quickly when your computer has a robust and speedy CPU. The amount of work you are doing will affect how long it takes for a website to load.

This means that if you’re attempting to see an episode of your favorite program while having a lot of tabs and apps open, it could appear a bit sluggish.

Technically speaking, in these cases, your internet service provider’s download speed has not changed. For example, you may still obtain a steady 30 Mbps, but website loading times can still be lengthy.

Regardless of your browser, you should notice that the solutions discussed in this artic;e should work when your Web browser is taking up CPU. However, the UI may differ, but you can figure it out in most cases.

In some cases, browser high CPU usage is caused by malware, so we recommend you use any of the best anti-malware compatible with Windows . Malware is a likely culprit if you notice Chrome using CPU when closed.

That should do it. If you have questions, suggestions, or alternative solutions, share them with us in the comments section below.

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How to uninstall edge extensions: 4 ways to pick from, best browser for duckduckgo: 5 privacy picks to choose from, 3 ways to fix chrome when the font size is too small on tabs, fix microsoft edge: an error has occurred download interrupted.

Sometimes, my Macbook Air start at full speed of heat fan just because I have Safari open. If I close the fan falls down.

You have any idea why this is happening?

It would depend on which Web site you are browsing. If it is a site that is not necessarily very dependent on intensive graphics or videos, this kind of CPU usage would be unusual.

aAlso remember that modern computing devices use multiple processors, same numbers greater than 100% are not atypical.

Tags: Mac OS & System Software

Similar Questions

trouble after Safari 9.1 update - noisy fan - warning of "Safari Web content (not responding)."

Click the Apple, top left, and then select force quit, ForceQuit Safari in the list.

Restart Safari.

I recently had an Android Tablet and loaded Firefox on it as my browser. First of all, I intend to use it for reading web content, sometimes when offline - i.e., I would like to be able to load some websites at home, leave Firefox open and put to sleep (NOT turn off), go somewhere where I don't have wifi, then wake the Tablet and read my sites loaded - just like I do with my laptop but much more portable.

The problem is that it seems that when I do this and go in Firefox after the awakening of my tablet, the browser seems to always reload the Web page from scratch. It is a pain because it means that I have a wifi access to read Web pages and I often partially through a post very long blog/forum or something similar, and I spend a lot of time scrolling to where I was.

Anyone know why this is happening and what I need to do to get Firefox to just keep the content I have already loaded?

OK, tried this today and it worked fine. I don't know what happened yesterday. Close this question!

Safari is badly hung on my iMac 2011 and I'm using version 9.1.2 (11601.7.7)

I have 20 GB of physical ram.

Looking at activity monitor, I regularly see that both Web safari & or flash player (internet safari plugin) (not answer) in red.

Physical memory is sometimes heavily exhausted and then calms down when I shut safari. I tend to keep a number of tabs open in safari, because that's the way I run my business.

I checked that adobe flash player is up to date and works well.

All the boxes are checked in Safari preferences under Security and "Allow" is in place for Adobe Flash Player etc.

I cleared my history and cookies.

Can anyone advise what I can do?

Run EtreCheck and post the report here.


Download, open the download folder, click on it to open it and select 'open '.

Select a problem from the menu popup box "Choose a problem", then "Start EtreCheck" in the dialog box.

Click on the button "Report share" in the toolbar, select "Copy to Clipboard" and then paste it when replying.

web content 100 cpu

Download and run Etrecheck .  Copy and paste the results in your response. Etrecheck is a diagnostic tool that has been developed by one of the most respected users here (and recommended by Apple Support personnel) of the CSA to provide an overview of the system and help identify the most obvious culprits that can adversely affect the performance of a Mac.

web content 100 cpu

This problem just happened while looking through the Mozillza support site.

I only have usually a website open at a time and this was the case during this most recent event. Please, couch answers in simplest terms as I am old and unfamiliar with techspeak. Thank you!

Have you noticed any other unusual behavior?

In the case where one of your extensions is concerned, could test the page Firefox Safe Mode? It is a standard diagnostic tool to disable some advanced features of Firefox and extensions. More info: questions to troubleshoot Firefox in Safe Mode .

You can restart Firefox in Mode safe help

Help > restart with disabled modules (Flash and other plugins still works)

In the dialog box, click on 'Start mode safe' ( not Reset)

Any difference?

I'm on MacBookPro 15 inch with 16 GB of ram and i7, but my watch 100 activity monitor. CPU for safari web content why is this true

You can have a Safari extension or the third party plugin installed which is causing a conflict. It is easy to solve the problems.

In the Safari menu, click Safari > Preferences , and select the tab ' Extensions '. If there are installed extensions, one at a time uninstall and exit then restart Safari to test.

If it is not a question of extensions, try troubleshooting third-party plug-ins.

Back to Safari > Preferences . This time select the tab Security Deselect: plug-ins Allow . Quit and restart Safari to test.

If it makes a difference, the instructions of troubleshooting plugins here.

Suppose for example I ran Inspire magazine and had a folio called June 2015, can I create a link to an article within this folio using the web content viewer? Take the structure for example below.

Inspire (App)

-April 2015 (Folio)

-May 2015 (Folio)

-June 2015 (Folio)

-Editorial (Article)

-Cover story (post to display on the Web page )

-Interview featured (Article)

Can I have just a link to this article using the Adobe Web content viewer, or is the folio June 2015 the only thing I'm allowed to link on a web page? Thanks in advance for the help!

Take a look at this article: Content Viewer web Embedding in your web page. Adobe Developer Connection

It describes the URL scheme to access a specific article:

Does that answer your question?

Is there a way to stop a Web Content container to open the web viewer full screen when you type a link in it?

I have a Web content area with a web page in it and whenever I type a link in it, it opens the web viewer full page and hoping that ask you do not.

Any ideas or suggestions would be very appreciated.

You can not, this is how it is designed.

This question has been posted in response to the following article: http://helpx.Adobe.com/Digital-Publishing-Suite/help/Web-content-overlays.html

The features in the Panel inlays Folio work only in folios DPS, not in interactive PDF files.

The canvas of tabs to display on the table of contents in the layout editor, it actually takes to pull the canvas with the table of Contents tab; for example: open your table of contents in the layout editor, click on the button of toolbar tabbed canvas and then draw it on your table of contents. If you create the canvas through the Navigator object tabs object and then set the properties so it would display on the table of content - it is not visible on the table of content with the layout editor.

This is a bit of an oddity in the form designer, and they have not corrected in newer versions of the forms again. :-(

Hope this helps, Craig B-)

If someone useful or appropriate, please mark accordingly.

I had a problem with macOS Sierra and Safari 10 where the CPU load for any tab was about 140% and the spinning fans, this was resolved by disabling Trusteer report. However, I still have a running process 'Mail content Web' running at 199% and fans of loading up every so often. Is this normal (seems a bit high) or is there something else I should disable/enable?

Hello danielfromfareham!

Welcome to the communities of Apple Support!  Your question about your fans to vives after upgrading to Mac OS Sierra is greatly appreciated.  I know that if my Mac to run loudly after the upgrade, I'd be worried too.  It is my pleasure to help in any way I can today.

Reset the management system (SCM) controller on your Mac.

For more information on your Mac fans, check out this link:

Learn more about your Mac fans

Can I put OS Lion directly to El Capitan without an intermediate upgrade. I have a MacBook Pro late 2011. Safari no longer works on a lot of web content with this OS not.

I need help with my Safari browser on my Mac.

Im trying to remove all Web site data with the following procedure:

Safari-> Preferences-> privacy-> Remove All Data Web site...

His does not work. Before clicking on the button I have 108 Web sites stored cookies or other data, I click the button, and nothing happens... I'm still 108 cookies.

I also did the following:

. - activate the Menu developer and Cache empty and tried again... nothing

. - used CleanMyMac v3 and it says I don't have cookies.

. - order iCloud Sync of Safari on the computer and try again... same problem

. - removed manually com.apple . Safari . Secure

Any help will be great. Please let me know if you need any additional info.

Hello DZanvettor,

Thank you for using communities of Apple Support.

If I understand your message that nothing happens when you try to remove the Safari Web site data. I know how it is important for you to be able to remove the Safari Web site data. I recommend that you restart your Mac into safe mode and see if you can remove the data from the Web site in secure mode.

Here are the steps to restart your Mac in safe mode:

Safe mode (sometimes called secure boot) is a way to start up your Mac so that it performs certain checks and prevents certain software from loading automatically or opening. From your Mac in safe mode does the following: * Check your startup disk and attempts to fix problems if necessary directory * Loads only required kernel extensions * Prevents the elements start and the login items open automatically * Disables installed user fonts * Delete font caches, hiding the kernel and other files of the system cache * Together, these changes can help resolve or isolate issues related to your startup disk. Follow these steps to start in safe mode. 1. start or restart your Mac. 2. as soon as you hear the startup tone, hold down the SHIFT key. 3. release the SHIFT key when you see the Apple logo appears on the screen.

After you delete data from the Web site in safe mode restart your Mac and allow it to start up as usual. Then test the issue again.

Best regards.

Firefox still accept web content offline and the user data, I have never any notification regardless of the 'tell me when a website asks to store data for use in offline mode' parameter (in preferences > advanced > network).

I also completely erased all: permissions tab regardless of the "all sites > offline storage" storage offline implementation is always allowed.

Here is one - step by step to reproduce my problem. 1. make sure all: permissions is clear 2 make sure that the list to: Preferences > network > "the following Web sites are..." "is that clear 3. close the preferences window 4 go to go to http://appcachefacts.info/demo/ ... No notification about the offline cache will appear. 5. open the preferences, the list of preferences > network > "the following Web sites are..." » Will fill up now with http://appcachefacts.info (1.1 MB)

This article list persists even after closing the browser window and re - open. This happens with a total disregard for the settings described in the first paragraph.

I found a related question, but it's old and archived: https://support.Mozilla.org/he/questions/981189

Firefox will store small amounts (less than 50 MB) of data without asking permission.

You can switch the pref in offline mode - apps.allow_by_default to false to make Firefox ask.

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How to Fix High CPU Usage


High CPU usage is often connected to long loading times, sluggish performance, and unexpected crashes.

Task Manager’s Performance tab shows detailed information about CPU usage.

Older computers may not have the appropriate drivers for optimal performance. Updating these may fix the problem.

Some forms of malware increase CPU usage. Consider scanning your PC with a reputable antivirus program.


Is one process eating up nearly all your CPU’s resources? Here’s how to fix high CPU usage.

The central processing unit (CPU) is a PC’s brain. All of the system’s major components, like the graphics card and RAM, rely on instructions that come from the CPU. A properly functioning processor is a critical part of every gaming PC.

All processors have limits, and it’s normal for high-intensity games and applications to hit those limits without badly impacting performance. However, abnormally high CPU usage can cause the computer to stutter, become unresponsive, or crash.

If your computer seems to overwork its CPU even when high-intensity applications are closed, it may indicate a deeper problem. This can happen for several different reasons, which is why it’s important to learn how to fix high CPU usage in Windows 11.

1. Reboot Your PC

Before trying anything else, try restarting your PC. This piece of classic troubleshooting advice often leads to effective results. A reboot can clear out temporary files and potentially resolve slowdown in long-running processes. If that’s the only problem dragging down CPU performance, rebooting is likely to solve the problem.

2. End or Restart Processes

If rebooting doesn’t reduce abnormally high CPU usage, open the Task Manager. Here, you can track processes that use CPU resources and find out what your computer is actually doing with those resources.

Note that full-screen programs like games will sometimes hide the Task Manager behind their own window). To prevent this, click “Options” in the Task Manager’s top menu bar and select “Always On Top”. If you have a second monitor, you can also just drag the Task Manager window to it.

In the Task Manager, click the Processes tab at the top. Click on More Details at the bottom of this tab to reveal background Windows processes. Look for the “CPU” column near the top of the Processes tab and click it to order by CPU usage:

You can expect high CPU utilization when playing some games, running a video-editing or streaming application, performing an antivirus scan, or juggling many browser tabs. If you’re dealing with this kind of everyday high-CPU usage situation, you should close all background programs and tabs you aren’t using, then return to Task Manager and see if the situation has changed.

High CPU usage while multitasking can be normal. Modern CPUs handle multitasking situations by splitting processes between multiple processor cores, which work through different instruction threads simultaneously.

Intel® Thread Director, a feature introduced in 12th Gen Intel® Core™ processors, optimizes multitasking performance to increase core efficiency and reduce the performance impact of high-intensity applications like games. The latest Intel® Core™ processors also feature  Intel® Turbo Boost Technology that helps process heavy workloads by dynamically increasing the frequency of your CPU.

These processor technologies can greatly increase the speed of multitasking with demanding programs, but they don’t prevent abnormal CPU usage situations from occurring. If you see a background process with a name like Runtime Broker, Windows Session Manager, or Cortana at the top of the CPU column when you hit 100% CPU usage, then you have an issue.

These Windows processes should only use a small amount of processing power or memory — 0% or 1% is typical. When your PC is idle, all of these processes together should use less than 10% of your CPU capacity. However, buggy or unexpected behavior — for example, one Windows process trying and retrying to perform a search action that has been disabled elsewhere — can sometimes cause a single process to consume nearly all of your system’s resources.

After you’ve opened Task Manager and found the process unexpectedly using up a large amount of CPU resources, search online to identify it. You don’t want to stop a process like explorer.exe or winlogon.exe , unless you have a good reason. These processes handle graphic elements like the desktop Start menu and assign startup tasks to the PC when it’s turned on.

Once you’ve identified the process as non-critical and checked that you’ve saved whatever you were working on, click on the process to select it, then click End Process at the bottom right of Task Manager. End Process will cause the program to terminate without saving.

If a faulty process was the culprit for high CPU usage, your PC should work smoothly from this point onwards. Many Windows processes simply restart when terminated. This can reset them and prevent the new process from demanding as much CPU power as it was before.

3. Update Drivers

If a process is still using too much CPU, old or suboptimal drivers may be at fault. Drivers are programs that control particular devices connected to your motherboard. Updating your drivers may eliminate compatibility issues or bugs that cause increased CPU usage.

Open the Start menu, then Settings. Click Updates & Security, then the “Check for Updates” button. This will update critical drivers. Graphics card manufacturers also provide utilities (such as NVIDIA GeForce Experience for GPUs) which may improve overall performance when playing games.

Do not use third-party software for updating drivers. You may find companies advertising free driver updates on the Internet. The worst of these install malware on your computer. The best of them are simply redundant because Windows is perfectly capable of updating drivers on its own.

In some rare cases, updating your BIOS version can resolve high CPU usage problems. The BIOS (Basic Input Output System) is motherboard firmware that issues instructions to the computer’s other components during start-up.

On its own, updating the BIOS usually doesn’t lead to performance improvements. It can even introduce new issues that drag down performance, so you should only do this if you’ve identified a bug that causes high CPU usage and found a BIOS update that directly addresses it.

You can update the BIOS automatically with a utility provided by the motherboard manufacturer. You can also update it manually by navigating to the manufacturer’s web page. Look up your motherboard model and BIOS version number, head to the manufacturer’s website, click on “Support”, and click “BIOS” to find relevant updates.

Not sure what motherboard you have? Click the Start button, then type “System Information” and click on this program when it appears:

web content 100 cpu

Look at the “System Manufacturer”, “System Model”, and “BIOS Version/Date” fields in the System Information window to find your motherboard. (For example, a Z170X board from GIGABYTE).

Double-check the version number to ensure you’re not already up to date. If you’re not, download and install the new BIOS version, reboot, and check Task Manager again to see if the issue persists.

4. Scan for malware

If the issue persists, there’s a possibility it’s caused by malware disguising itself as a normal Windows process. Some malicious programs use up CPU and GPU bandwidth for different purposes while appearing in Task Manager under a familiar name like “Cortana.exe” or “Runtime Broker”.

For example, “cryptojacking” software disguises itself as a normal process but actually uses your system’s resources to mine cryptocurrency. This kind of malware can significantly impact CPU performance, since your computer prioritizes illicit cryptocurrency mining operations over your applications and games.

Other forms of malware use compromised system resources for things like breaking passwords and encryption algorithms. These are demanding, high-intensity applications that cybercriminals regularly need, and using your system resources is more profitable than buying their own.

Run a full scan of your system with a reputable antivirus scan to check for this. The free offline security scan provided by Windows Security is a good start, though it’s not guaranteed to catch the latest and most sophisticated attacks.

5. Power Options

Some power settings can throttle the speed of your CPU. Power issues are familiar to laptop users, but they can impact desktop systems too. Check your Power Options by clicking the start menu and typing “Edit Power Plan”. Once open, click “Power Options” in the address bar at the top of the window. You should see this screen:

Click “Show additional plans”, then enable a non-power saver plan.

Now you can open Task Manager again to see if CPU usage returns to normal.

6. Find Specific Guidance Online

If you are still experiencing abnormally high CPU usage, it may be due to third-party applications or processes consuming more resources than they should. Since these processes come from sources outside your operating system, there is no one-size-fits-all solution for addressing their issues. You will need to seek advice from the developer responsible for creating the application running the process.

To do this, get the name of the process from the Processes tab of Task Manager, and search online for support threads on the topic.

If you don’t see results from your initial query, add in any specific information that might help, such as the model of your processor and the names of other programs associated with the issue. It’s rare to find a bug that hasn’t already been discussed in hardware and gaming forums, so take the time to try a few variations on your search.

You may find recommendations to disable services using the Windows Registry database. This is usually a temporary workaround, but it can be worth trying if a permanent fix isn’t available.

Before making any changes to the registry, it’s vital to create a restore point. This will save your computer’s current systems settings and allow you to restore them if your Registry edits unintentionally impact system stability. To create a restore point, click Start, then type “Create a restore point”. You’ll then need to select your hard drive and click “Configure”.

web content 100 cpu

After you click Apply, return to the previous screen and press the “Create” button to set a restore point.

The following steps will vary depending on the affected process. Remember that if you’re making any major changes to Windows based on online advice, you should always create a restore point first.

7. Reinstalling Windows

If you have a restore point from before the time your CPU issues began, try restoring from that point. If this is not the case, you can try to reinstall Windows to reset the system and resolve high CPU usage. This can be a long process, but it can potentially resolve CPU usage issues caused by software.

Reinstalling Windows will delete all of your installed applications. You have the option to keep your files, though. It’s not likely that an individual file is responsible for high CPU usage, so you don’t have to let Windows delete them all. However, backing up these files on an external drive or cloud service is a good idea, just in case.

When you’re ready to begin, click the Start button and type “Reset this PC”. Then click “Get Started”.

The process may take an hour or more. When it finishes, you will need to reinstall the games and applications you use.

Other Programs

CPU-Z is a reliable tool for checking general information about your CPU and motherboard. It shows the exact model numbers of your CPU and motherboard as well as performance information. You can use those model numbers to search online for support threads related to CPU usage.

Task Manager isn’t the only way to see what background processes are doing. Process Monitor logs not just CPU usage, but also registry, file system, and network activity. Check network activity using this tool if you suspect that a process could be malware.

Similarly, Performance Monitor is a built-in Windows tool that gives you a more detailed view of a process’s CPU usage over time. To open it, use the Windows Key + R, then type “perfmon”.

Performance Monitor has too many advanced features to describe here. Its primary function is breaking CPU usage into multiple categories per process and tracking it over time for advanced troubleshooting.

Find More Ways to Boost Your CPU

CPUs are designed to run safely at 100% CPU utilization. However, these situations can also impact the performance of high-intensity games and applications. Learning how to fix high CPU usage can resolve some of the most common problems.

However, not all CPU issues require software fixes. Your CPU may simply be unable to keep up with the games or applications you’re asking it to run.

This means it may be time for an upgrade. The latest Intel® CPUs deliver performance boosts for gamers and creative professionals alike. The 13th Gen Intel Core Processor Family incorporates high-speed Performance-cores and scalable Efficient-cores onto a single processor, providing distraction-free performance for the most demanding games and creative applications.

Learn More:

How to choose a gaming cpu.

When it comes to gaming CPUs, there are many options. Knowing what features to look for can help you find the right one.

Intel® Processors for Gaming and Names Explanation

Learn to identify the Intel® processors for gaming to take your gaming experience to the next level.

How 13th Gen Intel® Core™ Processors Work

Next gen support. Enhanced overclocking. Revolutionary hybrid design. 13th Gen Intel® Core™ desktop processors are here.

Notices & Disclaimers 1 2 3

Product and Performance Information

Intel, the Intel logo, and Core are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. Other names and brands may be claimed as the property of others. © Intel Corporation.

Intel® technologies may require enabled hardware, specific software, or services activation. Check with your system manufacturer or retailer.

© Intel Corporation.

web content 100 cpu

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NetNewsWire Web Content with high CPU utilization on Mac #3330


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How to Fix: High CPU Usage with Firefox browser?

High CPU usage in the Firefox browser is mainly due to the parsing of heavy website elements and background processes. It can be fixed by tweaking browser configuration and avoiding using many third-party add-ons running in the background. You can also clear the cache and adjust the Firewall settings.

Firefox is often regarded as the epitome of a secure browsing experience. Likewise, it also boasts a plethora of helpful feature sets, which, more often than not, checkmarks all the essential prerequisites for the end-user.

Whether on the customization front or efficient tab management , there’s much to look forward to. Moreover, it doesn’t hog too many system resources compared to its Chrome counterpart . Or so I thought.

Firefox Browser High CPU usage in Windows Task Manager

Upon recently switching to Firefox, I noticed my PC’s performance was constantly declining. Upon investigating it further via Windows Task Manager , the Firefox browser turned out to be the primary culprit. It was exhausting more than expected RAM and other related resources.

Moreover, it wasn’t a one-off case either. Many concerned users have posted the same query across various Mozilla Support Forums . If you are also on the same page and facing high CPU usage issues with the Firefox browser, this guide shall help you.

Try out the Basic Fixes

Before moving on to the slightly advanced fixes, let’s start with some fundamental ones known to rectify the underlying issue more often than not. In this regard:

horizontal 3bar icon

These were the most basic fixes that often resolved the temporary CPU fluctuation. If this doesn’t help, you can follow along with the advanced troubleshooter.

Boot Firefox to Safe Mode

When you boot the browser to Safe mode, it will disable all the third-party add-ons , themes, and extensions. So if the browser performs along the expected lines in this mode, then the extensive resource consumption could be attributed to any of these add-ons. Hence it would be best if you consider disabling it.

Here are the steps to boot Firefox in Safe Mode with disabled add-ons :

Firefox Restart with Add-ons Disabled

Check how it is performing now. If you notice considerable improvement, boot the browser back to normal mode and uninstall the recently installed extensions , one at a time, until the performance issue is rectified.

While third-party add-ons add more features to the browser, they could well cause a few issues. In those cases, removing them and looking for alternatives is best.

Use Strict Tracking Protection

Firefox has three levels of tracking protection : Standard, Strict, and Custom. The Strict one is known to block most of the trackers, cookies, and contents across various sites. This, in turn, might also speed up the loading time of various sites. So you could consider enabling it.

Here are the steps to enable Strict privacy in the Firefox browser :

Enable Strict Privacy for Firefox Computer Browser

One of the most significant drawbacks of the Strict Mode is that its heavy protection mechanism could break some websites and their contents. So you might have to brace yourself for this tradeoff.

Enable Hardware Acceleration

Firefox uses your PC’s primary process when dealing with graphics-intensive components. However, other apps might not be able to make optimal usage of the RAM and hence could slow down the entire PC. Therefore, consider instructing the browser to use the PC’s graphics processor rather than the main one.

Here are the steps to enable hardware acceleration in Firefox computer :

Use Hardware Acceleration when available in Firefox

See if it manages to fix the high CPU usage issue of Firefox. The hardware acceleration feature depends on the graphics processor. Hence a weaker chipset might not give out a preferable mileage.

Decrease Content Process Limit

By default, Firefox allocates the maximum available content process (which is 8). This makes it easier for the browser to deal with multiple opened tabs at once. But on the flip side, it also leads to more RAM consumption. Hence you could consider decreasing its value for optimum RAM usage.

Here are the steps to reduce the content process limit in Firefox :

Setting Content Process Limit in Firefox Computer

Restart Firefox and then check whether the high CPU usage issue has been settled. Decreasing the content process limit might give you a hard time dealing with multiple tabs simultaneously. So consider keeping the number of opened tabs to a lower level.

Delete content-prefs.sqlite file

The content-prefs.sqlite file beholds data related to the user profiles. But if any bit of data gets corrupted, it could harm the browser’s overall performance. So it is recommended to delete this file and let Firefox automatically create its new instance.

Here are the steps to delete the firefox profile with content-prefs.sqlite :

Firefox Help Troubleshooting Information tab

Once done, restart the browser and see if the resource consumption has been minimized. Upon deleting the above file, you might notice some settings not synced with your preferences. So make sure to set it accordingly.

Refresh Firefox (Reset)

If none of the abovementioned methods gave favorable results, it’s time to reset the browser’s default state.

Note: Firefox Reset will remove all the third-party add-ons and customizations you made to the browser. However, your data ( bookmarks, passwords, etc.) will stay safe.

Here are the steps to reset and refresh the Firefox browser on your computer :

Reset and Refresh Firefox Browser

Upon carrying out these steps, you will lose all the installed extensions and configurations you made to the browser. However, if it ends up fixing the issue, then it’s worth the effort. I just checked if this has fixed the high CPU usage.

Bottom Line: Firefox’s High CPU Usage

So this was all from this guide; you could fix the high CPU usage issue with the Firefox browser. We have shared seven different fixes that could help you rectify high CPU usage in the Firefox browser.

Installing some third-party extensions kept the browser’s processes up and running all the time, leading to high resource consumption. So on booting the browser to Safe Mode, I could identify that the culprit was these add-ons.

Hence upon removing the recently installed extensions, the CPU usage was back along the expected lines.

If none of the above fixes work for you, then switching to an alternative browser for your computer is better. We have already listed the best browser for Windows and macOS .

With that said, do let us know in the comments section which spelled out success in your case. Also, please share if anything else has helped you fix the issues.

Lastly, if you've any thoughts on How to Fix: High CPU Usage with Firefox browser? , then feel free to drop in below comment box .

Also, please subscribe to our @DigitalTechStudio YT channel for helpful videos tutorials.

Disclosure : This page may contain affiliate links, which means we may receive compensation for your purchases using our links; of course at no extra cost to you (indeed, you may get special discounts).

4 thoughts on “How to Fix: High CPU Usage with Firefox browser?”

Firefox Version 90 – et al….It’s becoming a part time job, Firefox work-arounds….

In the interim, I did a simple .bat that I use every time I exit Firefox. It immediately kills the 9-12 hoggy processes that keep running long after you exit the browser. I’ve had no mal-effect from using this. The browser opens/operates rapidly and predictably afterward. Also this immediately frees up my resources so that I can…jee.. actually USE my computer after a session on Firefox.

To make your own: 1. Open Notepad & type or copy/paste from here: taskkill /F /IM firefox.exe 2. Save it as the default .txt file with any name that is meaningful to you… “Parasite.txt” whatever… Locate this file you just saved, right click and select “rename.” Change the file extension (last three characters) from “.txt” to .bat. – if you want to get swoopy, create an icon for this (right click) and put it on your desktop for handy access.

To use: Every time you close Firefox, double click on either the .bat file you created or your swoopy icon. It assassinates all of the active and running Firefox.exe processes in a blink.

I was trying to diagnose issues with Windows and a laptop that had freezing issues. So I installed Ubuntu 22.04LTS. When running Firefox or Edge browser I experienced strange spikes with CPU. Although the spikes would affect one core at a time or move from a virtual core to a logical core. At first I thought maybe it was due to fractional scaling, so I went back to 100% scale. Still saw random 100% spikes with cores and fan would max out. Temps would go from 40c to 80c in an instant. I tried re-applying thermal paste which reduced idle temps from 40c to 35c so I knew it was effective. Mind you this is only a 10th gen. Core i3 10110u dual core CPU. After awhile I noticed the spikes also was causing the laptop to freeze up as well. Telling me, there was some serious heat issues.

Hi John, is your system running on the SSD or HDD? Generally, the mechanical HDD has a major effect on the system’s performance, causing the over usage of CPU for minimal activity. SSD makes the overall system smooth and irons out all the CPU-related issues.

I tried all of the steps outlined above, including “Refresh Firefox”. They may have mitigated the performance issue but Firefox is still a CPU hog, even when not accessing the web at all and without any tabs open (except for the default home page).

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