Red Hat Bugzilla – Bug 451151
Firefox crashes when many tabs are opened simultaneously
Last modified: 2018-04-11 13:51:42 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:126.96.36.199) Gecko/20080416 Fedora/188.8.131.52-1.fc8 Firefox/184.108.40.206
Description of problem:
When many (6 to 10) tabs are opened simultaneously (using the "Open All in Tabs" selection in Bookmarks), Firefox will sometimes crash while loading them (usually after a number of seconds). Whether it does so appears to depend on the content of the pages loaded: a crash seems to be more likely if there are many embedded media links in the pages being loaded.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Load many tabs (e.g., six or more blogs).
2. Firefox may crash before they are all done loading (or not).
Gecko produces a bug report when Firefox crashes. The file is about 500K long (a core dump?), so I can't put it here.
Created attachment 309154 [details]
"Bug report" produced by gecko when firefox crashed
Unfortunately, this backtrace is almost useless for us. Could we get an
old-fashioned backtrace created by the following method, please?
Please install firefox-debuginfo (debuginfo-install is from
Then run firefox with a parameter -g. That will start firefox running inside of
gdb debugger. Then use command run and do whatever you did to make firefox
crash. When it happens, you should go back to the gdb and run
(gdb) thread apply all backtrace
This produces usually many screens of the text. Copy all of them into a text
editor and attach the file to the bug as an uncompressed attachment.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 309261 [details]
Backtrace from firefox -g, as requested
debuginfo-install could not find anything for esound.i386 or keyutils.i386
This looks like some kind of race condition for flash player. Which sounds bad,
because we cannot do anything about it? Do you have multiple flash-needed sites
among the ones which are being opened?
I was afraid of that. Yes, there are multiple flash sites.
Must flash crashing cause firefox to crash?
(In reply to comment #5)
> Must flash crashing cause firefox to crash?
Unfortunately for Firefox 2, yes it does -- it is effectively part of firefox
process, so when it goes down, whole thing breaks. However, Firefox 3 (which is
in Fedora 9) uses nspluginwrapper which (among other things) wraps flash plugin
so that it is not part of the firefox process, so that when flash plugin crashes
Firefox still stands.
I am afraid there is not much we can do about it with Firefox 2. Closing as
CANTFIX (because that's our situation).