Firefox / Regulary cpu usage in Windows & Linux - who has same problem?
Hello!
Already a long time i have strange problem in Firefox (even in the current v56.0.2 version) under Windows 7 & Linux (Ubuntu 16.04 LTE). Problem occurs every day in many times.
Manifestations: when i have browsing even with 1-2 tabs the firefox begins to eat one core of CPU. If computer has 8 cores - a firefox eats 13%. If OS is Ubuntu - i see 100% in top command (100% there is one core load). Sometime Firefox hangs up, sometime i can do "Quit".
But! After quiting i see firefox process to be eating same volume CPU (one core only). If i start again Firefox i see warning that the firefox is running. To repair this problem i do: in Windows i kill process by manually through Task manager, in Ubuntu i do "killall -HUP firefox". When i start firefox again after a few time problem comes to me again...
Same problem exists a long time. I saw this in 54, 55 versions of Firefox.
This problem is aggravated by the fact that it is not reported through crash reports (about:crashes) because it's not crash for firefox itself... This problem may be diagnosted only by Night buildes but i tried to install Night build and it very buggy but i should work... So i cannot catch a reasons of this bug. I even tried to run Safe mode many times but problem comes to again and again. It not related with amount of opened tabs! I see it with only one (!) empty tab! I tried to delete Firefox account and did the new account for synchronization. It didn't help to me in anyway...
I don't know what happens with Firefox but it happens and it is there! I even think about a hidden mining of cryptocurrencies installed to all releases of Firefox. I cannot other imagine why it regulary is there and not to be fixed. And i don't see many topics about this but it definitely exists! And i don't know what can i do :( I disabled many not-important for me add-ons but problem exists.
Please write to here anybody who sees same problem regulary!
Best regards, Alexey
Chosen solution
This may help you; How to crash Firefox (All Systems); Instructions here; https://developer.mozilla.org/en-US/docs/Mozilla/How_to_report_a_hung_Firefox
This link has a program that can crash Firefox.
Read this answer in context 👍 1All Replies (7)
Please consider turning on send info to Mozilla before posting a question. This helps us help you. Am shooting in the dark. I would have known below if you had turned it on.
You need to do instructions backwards to disable Multi core Process .
See if Multi-Processor Support is turned on. Multi-processor support feature may be disabled depending on your setup (it was for me) - you can check this by launching Firefox, then enter in "about:support" in the address bar; near the bottom, you should see a heading that says: "Multiprocess Windows", then look at the value next to it. If it says "0/1", then that means it's disabled. so if is 0/2 or higher it is turned on.
You can try to modify multi-process settings to see if this has effect.
set dom.ipc.processCount to 1 if it is currently set to a higher value (4) disable multi-process windows in Firefox
You can disable multi-process windows in Firefox by setting these prefs to false on the about:config page.
browser.tabs.remote.autostart = false browser.tabs.remote.autostart.2 = false
You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.
http://kb.mozillazine.org/about:config http://www.ghacks.net/2016/07/22/multi-process-firefox/
Note : Firefox 56.0.2 is current release https://www.mozilla.org/firefox/all/ Full Version Installer Note : Firefox 57 Quantum release date Nov 14th https://www.mozilla.org/en-US/firefox/quantum/ Note : Legacy Extensions will be disabled and or removed.
Please let us know if this solved your issue or if need further assistance.
Chosen Solution
This may help you; How to crash Firefox (All Systems); Instructions here; https://developer.mozilla.org/en-US/docs/Mozilla/How_to_report_a_hung_Firefox
This link has a program that can crash Firefox.
Pkshadow said
See if Multi-Processor Support is turned on. Multi-processor support feature may be disabled depending on your setup (it was for me) - you can check this by launching Firefox, then enter in "about:support" in the address bar; near the bottom, you should see a heading that says: "Multiprocess Windows", then look at the value next to it. If it says "0/1", then that means it's disabled. so if is 0/2 or higher it is turned on.
Why you wrote to me about multi-core supporting if my problem that the Firefox cosumes ONE core only? Did you read my problem descrioption or this standard auto-reply?
FredMcD said
This may help you; How to crash Firefox (All Systems); Instructions here; https://developer.mozilla.org/en-US/docs/Mozilla/How_to_report_a_hung_Firefox This link has a program that can crash Firefox.
Thank you for your answer! I think it is what i need. I will try to make crash dump in Windows & Linus and i will send the report.
FredMcD said
This may help you;
I downloaded the crashfirefox.exe and i had run in cmd.exe after i run the crashfirefox.exe and i got this:
[...] (big list of processes running ... Checking process 7620, "firefox.exe" Could not create remote thread.
My firefox now doesn't hung. May be this is reason? But i think this tool should make dump of crash in anyway. :(
And i had read "The tool also has command-line options to kill processes with other names or by process ID." but i cannot see options (i tried --help or -h or /? options - nothing...)
I googled and now i downloaded by manually crashfirefox64.exe And i could get crash but firefox now works fine so i try now to delete normal posted crash :)
Good to hear. Keep us posted.