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Firefox keeps using up to 50% of the cpu and slows down subsequently. Closing and restarting it works but it is annoying

Posted

Occasionally, when I am using FF it gets noticeably slow. When checking the task manager it then shows firefox.exe using up to 50% of the CPU. Closing FF and restarting FF makes it work again. No noticeable link with other specific actions or web sites.

Occasionally, when I am using FF it gets noticeably slow. When checking the task manager it then shows firefox.exe using up to 50% of the CPU. Closing FF and restarting FF makes it work again. No noticeable link with other specific actions or web sites.

Additional System Details

This happened

A few times a week

This started when...

Months ago

Installed Plug-ins

  • Office Plugin for Netscape Navigator
  • 6.0.12.1675
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealJukebox Netscape Plugin
  • DNL Reader
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Default Plug-in
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.1"
  • Shockwave Flash 10.1 r102
  • iTunes Detector Plug-in
  • DivX Web Player version 1.4.0.233
  • npdivxplayerplugin
  • Picasa plugin
  • 4.0.50917.0
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Google Update
  • Java(TM) Platform SE binary
  • Next Generation Java Plug-in 1.6.0_18 for Mozilla browsers

Application

  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 GTB7.1 (.NET CLR 3.5.30729)

More Information

Application Basics
Name
Firefox
Version
3.6.12
Profile Directory
Open Containing Folder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Adblock Plus
1.3.1
true
{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
BetterPrivacy
1.48.3
true
{d40f5e7b-d2cf-4856-b441-cc613eeffbe3}
eBay Sidebar for Firefox
2.1.4
true
{62760FD6-B943-48C9-AB09-F99C6FE96088}
Google Toolbar for Firefox
7.1.20100830W
true
{3112ca9c-de6d-4884-a869-9855de68056c}
Java Console
6.0.13
false
{CAFEEFAC-0016-0000-0013-ABCDEFFEDCBA}
Java Console
6.0.15
false
{CAFEEFAC-0016-0000-0015-ABCDEFFEDCBA}
Java Console
6.0.17
false
{CAFEEFAC-0016-0000-0017-ABCDEFFEDCBA}
Java Console
6.0.18
true
{CAFEEFAC-0016-0000-0018-ABCDEFFEDCBA}
Microsoft .NET Framework Assistant
0.0.0
true
{20a82645-c095-46ed-80e3-08825760534b}
NoScript
2.0.5.1
true
{73a6fe31-595d-460b-a920-fcc0f8843232}
ReminderFox
1.9.8.4
true
{ada4b710-8346-4b82-8199-5de2b400a6ae}
British English Dictionary
1.19
true
en-GB@dictionaries.addons.mozilla.org
Modified Preferences
Name
Value
accessibility.typeaheadfind.flashBar
0
browser.fixup.alternate.enabled
false
browser.history_expire_days.mirror
180
browser.places.importBookmarksHTML
false
browser.places.importDefaults
false
browser.places.leftPaneFolderId
-1
browser.places.migratePostDataAnnotations
false
browser.places.smartBookmarksVersion
2
browser.places.updateRecentTagsUri
false
browser.startup.homepage
https://identity.virginmedia.com/vm_sso/idp/requestAssertion.action?SAMLRequest=fVLJTsMwEL0j8Q%2BW781CEUJWE1RAFZUKRDTlwM…
browser.startup.homepage_override.mstone
rv:1.9.2.12
browser.tabs.closeWindowWithLastTab
false
browser.tabs.loadFolderAndReplace
false
browser.tabs.loadInBackground
false
browser.tabs.warnOnClose
false
extensions.lastAppVersion
3.6.12
general.useragent.extra.betterprivacy
general.useragent.extra.microsoftdotnet
(.NET CLR 3.5.30729)
network.cookie.prefsMigrated
true
network.http.max-connections
48
network.http.max-connections-per-server
16
network.http.max-persistent-connections-per-proxy
16
network.http.max-persistent-connections-per-server
8
places.last_vacuum
1289468239
print.print_printer
HP PSC 1500 series
print.printer_Adobe_PDF.print_bgcolor
false
print.printer_Adobe_PDF.print_bgimages
false
print.printer_Adobe_PDF.print_command
print.printer_Adobe_PDF.print_downloadfonts
false
print.printer_Adobe_PDF.print_edge_bottom
0
print.printer_Adobe_PDF.print_edge_left
0
print.printer_Adobe_PDF.print_edge_right
0
print.printer_Adobe_PDF.print_edge_top
0
print.printer_Adobe_PDF.print_evenpages
true
print.printer_Adobe_PDF.print_footercenter
print.printer_Adobe_PDF.print_footerleft
&PT
print.printer_Adobe_PDF.print_footerright
&D
print.printer_Adobe_PDF.print_headercenter
print.printer_Adobe_PDF.print_headerleft
&T
print.printer_Adobe_PDF.print_headerright
&U
print.printer_Adobe_PDF.print_in_color
true
print.printer_Adobe_PDF.print_margin_bottom
0.5
print.printer_Adobe_PDF.print_margin_left
0.5
print.printer_Adobe_PDF.print_margin_right
0.5
print.printer_Adobe_PDF.print_margin_top
0.5
print.printer_Adobe_PDF.print_oddpages
true
print.printer_Adobe_PDF.print_orientation
0
print.printer_Adobe_PDF.print_pagedelay
500
print.printer_Adobe_PDF.print_paper_data
9
print.printer_Adobe_PDF.print_paper_height
11.00
print.printer_Adobe_PDF.print_paper_size_type
0
print.printer_Adobe_PDF.print_paper_size_unit
1
print.printer_Adobe_PDF.print_paper_width
8.50
print.printer_Adobe_PDF.print_reversed
false
print.printer_Adobe_PDF.print_scaling
1.00
print.printer_Adobe_PDF.print_shrink_to_fit
true
print.printer_Adobe_PDF.print_to_file
false
print.printer_Adobe_PDF.print_unwriteable_margin_bottom
0
print.printer_Adobe_PDF.print_unwriteable_margin_left
0
print.printer_Adobe_PDF.print_unwriteable_margin_right
0
print.printer_Adobe_PDF.print_unwriteable_margin_top
0
print.printer_HP_PSC_1500_series.print_bgcolor
false
print.printer_HP_PSC_1500_series.print_bgimages
false
print.printer_HP_PSC_1500_series.print_command
print.printer_HP_PSC_1500_series.print_downloadfonts
false
print.printer_HP_PSC_1500_series.print_edge_bottom
0
print.printer_HP_PSC_1500_series.print_edge_left
0
print.printer_HP_PSC_1500_series.print_edge_right
0
print.printer_HP_PSC_1500_series.print_edge_top
0
print.printer_HP_PSC_1500_series.print_evenpages
true
print.printer_HP_PSC_1500_series.print_footercenter
print.printer_HP_PSC_1500_series.print_footerleft
&PT
print.printer_HP_PSC_1500_series.print_footerright
&D
print.printer_HP_PSC_1500_series.print_headercenter
print.printer_HP_PSC_1500_series.print_headerleft
&T
print.printer_HP_PSC_1500_series.print_headerright
&U
print.printer_HP_PSC_1500_series.print_in_color
true
print.printer_HP_PSC_1500_series.print_margin_bottom
0.5
print.printer_HP_PSC_1500_series.print_margin_left
0.5
print.printer_HP_PSC_1500_series.print_margin_right
0.5
print.printer_HP_PSC_1500_series.print_margin_top
0.5
print.printer_HP_PSC_1500_series.print_oddpages
true
print.printer_HP_PSC_1500_series.print_orientation
0
print.printer_HP_PSC_1500_series.print_pagedelay
500
print.printer_HP_PSC_1500_series.print_paper_data
9
print.printer_HP_PSC_1500_series.print_paper_height
11.00
print.printer_HP_PSC_1500_series.print_paper_size_type
0
print.printer_HP_PSC_1500_series.print_paper_size_unit
1
print.printer_HP_PSC_1500_series.print_paper_width
8.50
print.printer_HP_PSC_1500_series.print_reversed
false
print.printer_HP_PSC_1500_series.print_scaling
1.00
print.printer_HP_PSC_1500_series.print_shrink_to_fit
true
print.printer_HP_PSC_1500_series.print_to_file
false
print.printer_HP_PSC_1500_series.print_unwriteable_margin_bottom
0
print.printer_HP_PSC_1500_series.print_unwriteable_margin_left
0
print.printer_HP_PSC_1500_series.print_unwriteable_margin_right
0
print.printer_HP_PSC_1500_series.print_unwriteable_margin_top
0
privacy.sanitize.migrateFx3Prefs
true
security.default_personal_cert
Select Automatically
security.disable_button.openCertManager
false
security.disable_button.openDeviceManager
false
security.warn_viewing_mixed
false
security.warn_viewing_mixed.show_once
false

Fat Bear 0 solutions 1 answers

Helpful Reply

Because the problem happens only every other day or so, it is not feasible to use the safe-mode method to determine which addon might be causing the problem. The safe-mode method is best suited for problems that deterministically happen within a short period after Firefox launching.

There needs to be a diagnostic approach that can determine where in the code Firefox is spending its cycles. Please, Mozilla developers: can you provide the community with a Firefox Profiler? I imagine three new menu items: (1) Turn on/off profiling; (2) clear profiling statistics; and, (3) show profiling statistics.

Because the problem happens only every other day or so, it is not feasible to use the safe-mode method to determine which addon might be causing the problem. The safe-mode method is best suited for problems that deterministically happen within a short period after Firefox launching. There needs to be a diagnostic approach that can determine where in the code Firefox is spending its cycles. '''Please, Mozilla developers: can you provide the community with a Firefox Profiler?''' I imagine three new menu items: (1) Turn on/off profiling; (2) clear profiling statistics; and, (3) show profiling statistics.
cognisant2000 0 solutions 1 answers

I have the same issue but here are some more information:

1. This only happened if I have multiple tabs open and one has to be Google search. 2. If Google is idle (no SERP) then all is fine. 3. As soon as I do a search (live search is on) the CPU usage goes up. Once the SERP is displayed the CPU usage continues to creep up. 4. Things get worst if I open a link from SERP in a new Tab, which sends the CPU rocketing to 100% and will not let go unless I close both the SERP and the new tab. 5. Other tabs do not need to be closed and CPU usage goes back to normal once the 2 new tabs are closed. 6. I run WOT add-on, which is the only thing that can possibly have anything to do with SERP. Disable WOT and all is well again!!! 7. Finally this problem has only manifested itself since 3.6.12 upgrade.

Hope this helps.

I have the same issue but here are some more information: 1. This only happened if I have multiple tabs open and one has to be Google search. 2. If Google is idle (no SERP) then all is fine. 3. As soon as I do a search (live search is on) the CPU usage goes up. Once the SERP is displayed the CPU usage continues to creep up. 4. Things get worst if I open a link from SERP in a new Tab, which sends the CPU rocketing to 100% and will not let go unless I close both the SERP and the new tab. 5. Other tabs do not need to be closed and CPU usage goes back to normal once the 2 new tabs are closed. 6. I run WOT add-on, which is the only thing that can possibly have anything to do with SERP. Disable WOT and all is well again!!! 7. Finally this problem has only manifested itself since 3.6.12 upgrade. Hope this helps.

Question owner

Cognisant2 - Thank you for your additional info. I do not run WOT so that is not the key cause of the problem. I am not certain about the google part so I will monitor that. I think I also had this problem before 3.6.12 upgrade.

Cognisant2 - Thank you for your additional info. I do not run WOT so that is not the key cause of the problem. I am not certain about the google part so I will monitor that. I think I also had this problem before 3.6.12 upgrade.

Question owner

Just had the problem happen again. had 2 tabs open - my normal email and a news paper - so no Google link. Also disabled as many of the add ons as I could but that made no difference. Restrated FF and all OK

Just had the problem happen again. had 2 tabs open - my normal email and a news paper - so no Google link. Also disabled as many of the add ons as I could but that made no difference. Restrated FF and all OK

Question owner

Disappointing to still have no response from FIREFOX about this problem. It has been around for a while and probably affects a lot of users. I guess that if there is no solution soon I will have to move to Chrome or similar.

Disappointing to still have no response from FIREFOX about this problem. It has been around for a while and probably affects a lot of users. I guess that if there is no solution soon I will have to move to Chrome or similar.
BillBurcham 0 solutions 1 answers

I see this on OS X and Firefox 4. Performance starts out great. But then over night when I come back to my (many tabs) I see CPU utilization oscillating between say 50% and 90% or so. I use gmail and calendar and lots of other stuff of course and usually have on the order of 10-15 tabs open.

I see this on OS X and Firefox 4. Performance starts out great. But then over night when I come back to my (many tabs) I see CPU utilization oscillating between say 50% and 90% or so. I use gmail and calendar and lots of other stuff of course and usually have on the order of 10-15 tabs open.
Varinen 0 solutions 1 answers

Helpful Reply

Same problem. CPU goes high and the browser gets non-responsive. I have localized the problem by enabling an disabling add-ons. There seems to be something wrong with the Google toolbar. I have been running the browser without this toolbar for 4 days now and everything seems to be OK. Miss the toolbar though.

Same problem. CPU goes high and the browser gets non-responsive. I have localized the problem by enabling an disabling add-ons. There seems to be something wrong with the Google toolbar. I have been running the browser without this toolbar for 4 days now and everything seems to be OK. Miss the toolbar though.

Modified by Varinen

zorg 0 solutions 1 answers

Interesting point if Google is the ultimate issue. I have abandoned FF for a month now since this is such an aggravating problem. I too, open multiple tabs and also multiple windows for browsing on XP (HP laptop). Whatever the issue, this is critical for those who see it - the browser is no longer usable. I am now at the mercy of IE-8... and it sure is no fun!

Interesting point if Google is the ultimate issue. I have abandoned FF for a month now since this is such an aggravating problem. I too, open multiple tabs and also multiple windows for browsing on XP (HP laptop). Whatever the issue, this is critical for those who see it - the browser is no longer usable. I am now at the mercy of IE-8... and it sure is no fun!