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Why FF sometimes takes up to 50% of CPU on closing?

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To clarify, I don't have any issue on start-up or during web surfing. Only when I close the browser, especially after a long surfing session, I see that it's taking up to 50% of CPU for at least 30-60 seconds! Lately I also get the message "FF has crashed", which is ok since I'm exiting the browser anyway. What is FF doing at closing? What INFO is it saving?

Yes, my system is outdated, but it's working ok for me, for now at least.

To clarify, I don't have any issue on start-up or during web surfing. Only when I close the browser, especially after a long surfing session, I see that it's taking up to 50% of CPU for at least 30-60 seconds! Lately I also get the message "FF has crashed", which is ok since I'm exiting the browser anyway. What is FF doing at closing? What INFO is it saving? Yes, my system is outdated, but it's working ok for me, for now at least.

Mehr Details zum System

Installierte Plugins

  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • npAliSSOLogin Plugin
  • npwangwang
  • Alipay Security Control
  • Alipay Internet Health Control
  • npaliedit
  • npalidcp
  • China Merchants Bank Edit
  • Version 5.41.3.0
  • Google Update
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Office Authorization plug-in for NPAPI browsers
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • DRM Netscape Network Object
  • DRM Store Netscape Plugin
  • QQ2013 Chrome Plugin for Chrome V23.0.1271.64 or latest version
  • QQ2013 Firefox Plugin
  • Shockwave Flash 13.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 11.5
  • QQ QuickLogin Helper
  • VLC media player Web Plugin 2.1.3
  • Npdsplay dll
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • iTrusPTA&XEnroll hwPTA,IEnroll,UKeyInstalls for FireFox,version=1.0.0.2
  • npalicdo

Anwendung

  • User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:38.0) Gecko/20100101 Firefox/38.0

Weitere Informationen

the-edmeister
  • Top 25 Contributor
  • Moderator
5399 Lösungen 40160 Antworten
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Hilfreiche Antwort

Basically housekeeping for user data that use temporary or transient storage files while Firefox is running. When the user closes Firefox the data that is in those transient files gets saved to their "permanent home" files.

As far as Firefox crashing when you close it - that shouldn't be happening. And when Firefox does crash there is always the risk of user data getting lost. As far as you using an older Firefox 38.0 version - not normal for Firefox to crash upon closing. Never happens for me with the Firefox ESR 38.7.1 version (on Win7) that I still use everyday. I open and close Firefox ESR as often as 10 times a day, and it has never crashed upon closing. And about the only time it crashes at all (or goes unresponsive) for me is when Flash is running.

Basically housekeeping for user data that use temporary or transient storage files while Firefox is running. When the user closes Firefox the data that is in those transient files gets saved to their "permanent home" files. As far as Firefox crashing when you close it - that shouldn't be happening. And when Firefox does crash there is always the risk of user data getting lost. As far as you using an older Firefox 38.0 version - not normal for Firefox to crash upon closing. Never happens for me with the Firefox ESR 38.7.1 version (on Win7) that I still use everyday. I open and close Firefox ESR as often as 10 times a day, and it has never crashed upon closing. And about the only time it crashes at all (or goes unresponsive) for me is when Flash is running.
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Fragesteller

the-edmeister said

Basically housekeeping for user data that use temporary or transient storage files while Firefox is running. When the user closes Firefox the data that is in those transient files gets saved to their "permanent home" files. As far as Firefox crashing when you close it - that shouldn't be happening. And when Firefox does crash there is always the risk of user data getting lost. As far as you using an older Firefox 38.0 version - not normal for Firefox to crash upon closing. Never happens for me with the Firefox ESR 38.7.1 version (on Win7) that I still use everyday. I open and close Firefox ESR as often as 10 times a day, and it has never crashed upon closing. And about the only time it crashes at all (or goes unresponsive) for me is when Flash is running.

Thanks!

To clarify, it only crashes when there's a lot of memory used up by FF.exe and the flash plug in.

I have disabled hardware acceleration since installation in fact.

I did add the Video Downloadhelper add on last week, which might exacerbate the situation.

Btw, FF is not clearing cache on exit, is there a way to do that automatically? Also, the default size is 300 MB I believe, does it make a difference to change that?

''the-edmeister [[#answer-1000017|said]]'' <blockquote> Basically housekeeping for user data that use temporary or transient storage files while Firefox is running. When the user closes Firefox the data that is in those transient files gets saved to their "permanent home" files. As far as Firefox crashing when you close it - that shouldn't be happening. And when Firefox does crash there is always the risk of user data getting lost. As far as you using an older Firefox 38.0 version - not normal for Firefox to crash upon closing. Never happens for me with the Firefox ESR 38.7.1 version (on Win7) that I still use everyday. I open and close Firefox ESR as often as 10 times a day, and it has never crashed upon closing. And about the only time it crashes at all (or goes unresponsive) for me is when Flash is running. </blockquote> Thanks! To clarify, it only crashes when there's a lot of memory used up by FF.exe and the flash plug in. I have disabled hardware acceleration since installation in fact. I did add the Video Downloadhelper add on last week, which might exacerbate the situation. Btw, FF is not clearing cache on exit, is there a way to do that automatically? Also, the default size is 300 MB I believe, does it make a difference to change that?
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Fragesteller

Forgot to ask you, is it worth it to try Firefox ESR 38.7.1 and where would I safely find it?

Forgot to ask you, is it worth it to try Firefox ESR 38.7.1 and where would I safely find it?
the-edmeister
  • Top 25 Contributor
  • Moderator
5399 Lösungen 40160 Antworten
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Having the cache clear on exit might exacerbate the crashing issue; more 'housekeeping' to do upon closing.

Did you go to about:crashes and then open the Crash Reports to see why Firefox is crashing?

Overall, I can "feel" when Firefox is about to crash and I restart it before it actually crashes. You can also look at the Windows Task Manager and see how much 'memory' Firefox is using, and once you get a feel for it you use that to know when Firefox 'needs' to be started. Catch it soon enough and the Restart will reload all the Tabs that were open. Wait too long and the Restart may 'drop' the most recently opened or used tabs due to Firefox locking up.

There are many extensions that add a Restart button button to Firefox. https://addons.mozilla.org/en-US/firefox/search/?q=Restart That Restart feature is also accessible from the Developer Console, but needs command line to use it; although I can't recall if that made it into the Developer Console in Fx 38 or not - I have never used it from there.

Look for an extension that is specifically compatible with Firefox 38 - will be labeled "Legacy" and may be labeled "Requires Restart" which would make it a non-SDK Legacy extension. iirc, probably developed before Fx 29 Australis came out.


Here is the last 38 ESR version, which has security updates equal to what Firefox 46 & ESR 45.1 had: http://ftp.mozilla.org/pub/firefox/releases/38.8.0esr/win32/en-US/

I can't recall why I didn't update to that at the end of April 2016 when that came out.

Having the cache clear on exit might exacerbate the crashing issue; more 'housekeeping' to do upon closing. Did you go to about:crashes and then open the Crash Reports to see why Firefox is crashing? Overall, I can "feel" when Firefox is about to crash and I restart it before it actually crashes. You can also look at the Windows Task Manager and see how much 'memory' Firefox is using, and once you get a feel for it you use that to know when Firefox 'needs' to be started. Catch it soon enough and the Restart will reload all the Tabs that were open. Wait too long and the Restart may 'drop' the most recently opened or used tabs due to Firefox locking up. There are many extensions that add a Restart button button to Firefox. https://addons.mozilla.org/en-US/firefox/search/?q=Restart ''That Restart feature is also accessible from the Developer Console, but needs command line to use it; although I can't recall if that made it into the Developer Console in Fx 38 or not - I have never used it from there.'' Look for an extension that is specifically compatible with Firefox 38 - will be labeled "Legacy" and may be labeled "Requires Restart" which would make it a non-SDK Legacy extension. ''iirc, probably developed before Fx 29 Australis came out''. ----------------------------------- Here is the last 38 ESR version, which has security updates equal to what Firefox 46 & ESR 45.1 had: http://ftp.mozilla.org/pub/firefox/releases/38.8.0esr/win32/en-US/ ''I can't recall why I didn't update to that at the end of April 2016 when that came out.''