Firefox sometimes hangs at opening a new tab and needs 100% CPU
Categories
(Firefox :: Untriaged, defect)
Tracking
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People
(Reporter: benjamin.zanger, Unassigned)
Details
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0
Steps to reproduce:
I opened a page in a new tab.
Actual results:
The new tab did not load. I was not able to switch the tab, but could create new ones and delte the tab. After deleting the tab, I could not enter any other tab. Even after closing firefox the CPU usage still was 100%. Had to use sigkill. It was not the first time I experienced the bug, probably already the third of fourth time since two months.
Expected results:
Page loading without any freezing.
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Comment 1•6 years ago
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Hi, the issue is reproducible only with a particular page or a random one?
Do you have add-ons? If yes please try in safe mode and see if the issue is still reproducible, here is a link that can help you:
https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
Also, it will be a good idea to try to test this on Nightly build, please download Firefox Nightly from here: https://nightly.mozilla.org/ and retest the problem.
Thanks
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Reporter | |
Comment 2•6 years ago
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I only experienced it really seldom, so it is hard to reproduce it. The webpages where different one (last time it was at opening a google search result in a new tab). As add on i use ublock origin. I will try to reproduce it, but as i already mentioned, it does not appear often. Is there a possibility to do a trace or memory dump? Would these information help you?
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Comment 3•6 years ago
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Thanks for your feedback, you can do for example a performance profile, but given the fact that the issue is randomly reproducible, I don't think you will be able to do it. You need to install an add-on, start the add-on and after that reproduce the issue, but your issue is reproducible randomly so that why I don't think you will be able to do it.
You can get more info on how to install and use the Cleopatra add-on (that helps you get the performance profile) by going to:
https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Profiling_with_the_Built-in_Profiler
https://perf-html.io/
Please also note that this add-on works only on FF Nightly, so that means you need to be able to reproduce the issue on Nightly first.
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Comment 4•6 years ago
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Hi,
Marking this as Resolved: Incomplete due to the lack of response from tbenjamin.zanger.
If the issue is still reproducible with the latest Firefox version, feel free to reopen the bug with more information. Thank you for your time.
Description
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