Firefox often crashes when I watch a Flash video

If my memory serves me right, it doesn't necessarily need a video to crash.
I tried Safe Mode and memtest86+, Safe Mode crashed anyway and memtest found nothing wrong. Also, I tried updating Flash to the latest version, without any improvement.
== Crash ID(s) ==
b493b847-abd1-4093-9917-932d82100607

Hello J.
Yes, Flash tends to do that sometimes, for some users. Thankfully Firefox 3.6.4 (the next update for Firefox 3.6) will not crash when a plugin crashes, which is very good!
Meanwhile, you may want to make sure all your add-ons (plugins, extensions, themes and all) are up to date. To manage add-ons go into ''Tools > Add-ons''. It's fairly straightforward. If they are, or if updating them doesn't fix it, you may be having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not coming from one of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] and select ''Disable all add-ons''. If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

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-> Tap '''ALT''' key or press '''F10''' to show the Menu Bar
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Firefox frequently hangs when loading websites with Flash video.

Firefox frequently completely freezes when viewing Flash video and the only way to release it is to manually kill the plugin-container process.
This have been verified with several Firefox versions, upto and including 3.6.10 and upto the lastest Flash release on systems running Windows 7 64-bit. This have been tested on multiple installations, different systems and on clean installations. However only tested on 64-bit HP systems so far.
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I have done some more testing and the problem seems to have been found:
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I am using the latest versions of Firefox, Flash and HP ProtectTools Security Manager Suite at the time of writing, including latest Windows security patches.
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Some of your crash reports weren’t sent to the Mozilla Servers.
In the address bar, type '''about:crashes'''<enter>.''' Note:''' If any reports do not
have '''BP''' in front of the numbers, click it and select '''Submit'''.
Using your mouse, '''mark''' the most '''resent 7 - 10''' crash reports, and
'''copy''' them. Now go to the reply box below and '''paste''' them in.
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'''https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration'''
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'''https://forums.adobe.com/message/4468493#TemporaryWorkaround'''
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'''https://forums.adobe.com/thread/891337'''
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Hello,
My MacBook is crashing when I watch Youtube videos. Safari and Flash Player are updated.
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*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
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*https://support.mozilla.org/kb/Mozilla+Crash+Reporter
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We're sorry to hear that your Firefox is crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.
#Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
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#Open the most recent 5 files with a text editor and copy the IDs.
#Paste each ID with '''bp-''' into the reply window on the forums.
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[http://support.mozilla.com/en-US/kb/Managing+Profiles]
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[http://portableapps.com/apps/internet/firefox_portable/test]

Firefox often crashes when I watch a Flash video

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