firefox hangs on navigating away from page with flash video embedded.

[Cara Donnelly]

Binary package hint: firefox-3.5

1)
Description: Ubuntu 9.10
Release: 9.10
2)
firefox:
  Installed: 3.5.7+nobinonly-0ubuntu0.9.10.1
  Candidate: 3.5.7+nobinonly-0ubuntu0.9.10.1
  Version table:
 *** 3.5.7+nobinonly-0ubuntu0.9.10.1 0
        500 http://gb.archive.ubuntu.com karmic-updates/main Packages
        500 http://security.ubuntu.com karmic-security/main Packages
        100 /var/lib/dpkg/status
     3.5.3+build1+nobinonly-0ubuntu6 0
        500 http://gb.archive.ubuntu.com karmic/main Packages

3)
I had just watched a short Youtube video embedded in the website Pharyngula. I decided to check another blog I read, so selected it from the bookmarks menu. I expected firefox to load the new website, successfully leaving the last website.

4)
Firefox greyed out and had to be killed. This happens regularly after trying to navigate away from websites on which videos have been watched, such as youtube.

ProblemType: Bug
Architecture: i386
Date: Thu Feb 18 18:26:52 2010
DistroRelease: Ubuntu 9.10
Package: firefox 3.5.7+nobinonly-0ubuntu0.9.10.1
PackageArchitecture: all
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: firefox-3.5
Uname: Linux 2.6.31-19-generic i686

[Cara Donnelly (cdonnelly)]

So I've tried three more times, and it happened two times out of three. Both times I've run apport on the process while it was running; here is one of the reports attached.

[zellfaze (zellfaze)]

I have noticed that Firefox's status becomes futex_wait_queue_me whenever this happens. I only have a vague understanding of what that means. I hope it helps though.

[Cara Donnelly (cdonnelly)]

Marking as fixed as Flash is now disabled by default in Firefox, with end-of-life scheduled for end of 2020.