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Firefox 4 Crashes while toggling between multiple open profiles (Firefox has stopped working)

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JustLooking
JustLooking
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So this problem just started occurring since I upgraded from firefox 3.6.5 to firefox4.

Sometimes I need to have two separate firefox profiles open at the same time. This is accomplished by making a second shortcut to your firefox.exe with the switches -P NewProfileName -no-remote (e.g. "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -P new -no-remote).

With firefox4 the second profile opens fine, but as soon as I select first profile it crashes with the windows error message "Firefox has stopped working." It doesn't send any crash reports to Mozilla, so unfortunately I can't give you any crash IDs (I checked about:crashes and there's no entries for the pertinent dates).

I'm currently using windows vista.

Any help would be very much appreciated.

Thank you in advance!

So this problem just started occurring since I upgraded from firefox 3.6.5 to firefox4. Sometimes I need to have two separate firefox profiles open at the same time. This is accomplished by making a second shortcut to your firefox.exe with the switches -P NewProfileName -no-remote (e.g. "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -P new -no-remote). With firefox4 the second profile opens fine, but as soon as I select first profile it crashes with the windows error message "Firefox has stopped working." It doesn't send any crash reports to Mozilla, so unfortunately I can't give you any crash IDs (I checked about:crashes and there's no entries for the pertinent dates). I'm currently using windows vista. Any help would be very much appreciated. Thank you in advance!

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rpertusio
rpertusio
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Yep. Same thing happens with me. It is the Flash plugin. If you disable it, you'll see it stops crashing. BUT, that's not a 'solution', rather a workaround for now. I tried rolling back to earlier versions of Flash, and it still crashes.

rpertusio
rpertusio
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It was fixed! You'll need to either wait for Firefox 4.0.1, or if it is really bugging you, get a pre-release (nightly) version today:

http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-2.0/

Anything 02 April 2011 or later should work in the above directory.

Here was the bug report that led to the fix of the problem, if interested: https://bugzilla.mozilla.org/show_bug.cgi?id=639885

Crash occurred on Hulu Pogo and Blip (and other sites), but applying the pre-release April 2nd update fixes it.

Good luck!