I just installed Flash plugin new version 11 and it crashes.

Question

Here are the crash messages:
c612cbd4-e20e-47a1-be1e-c6e5220953f3
97a164c3-c340-48c3-9d7b-981c507cbb7f
f090449-4b84-40d6-96f7-3244307c151d
983c2ee7-709e-4bd8-8db7-d965f3adbc62
9b1ba638-a005-4e64-b5f6-6b55a5ca1311

Answer 1

Were you using Flash 10.3 (or 11.1-11.2) before? Starting in Flash 11.3, Adobe added a new feature that causes havoc on some systems, called Protected Mode. You can disable that by editing an Adobe configuration file (step #3 below).
This is some standard guidance that addresses the most common Flash player issues in Firefox. I'm sure you've seen some of it before, but just in case:
(1) If you have installed any recorders/downloaders that interact with Flash media, make sure they are as up-to-date as possible, or disable them temporarily. Note: I didn't see any in your "More System Details."
(2) Disable hardware graphics acceleration in Firefox and in Flash
(A) In Firefox, un-check the box here and restart:
orange Firefox button (or Tools menu) > Options > Advanced > General > "Use hardware acceleration when available"
(B) In Flash, see this support article from Adobe: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues
(3) Disable protected mode (Windows Vista/7/8)
See this support article from Adobe under the heading "Last Resort": [http://forums.adobe.com/message/4468493#TemporaryWorkaround Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?]