Using the Firefox help site, the recommendation is to back date to Flash version
11.2 rather than any 11.3 version. I had the same problem (Flash 11.3 does not completely install) and followed the Firefox help links to remove 11.3 and install 11.2.
Crashes stopped.
There are several other sites recommending reverting to Flash 11.2.0.235. We did this and all is well with Firefox 13.0.1 on Win7 machines. I fully agree with NOT allowing auto-download and install.
May I also suggest that you look at your Java installation. Some folks allow it to update on its own. This is not a good idea. Completely remove Java and install the latest version manually offline from Oracle/Sun Java. I also do this for Flash and Shockwave.
You do not need to uninstall the old version. Just download the latest from the Adobe site - mine is 11.3.300.262 - and install it.
Yup, the last update to Flash completely broke Firefox's plugin container, so whenever you run something Flash based, it creates 2 Flash processes + the plugin container process, which is what causes the crashing. Actually, in my case, it was the plugin container that crashed, but Flash would stop working nevertheless.
Yes, just find an old(er) version of the plugin here:
Old Version of Adobe Flash Player Download - OldApps.com
Real gem, go to C:\ Windows\System32\ Macromed\ Flash, and run it ....
Running, you will get teh uninstaller, perform it.
If there are more than one, run teh both, and get your system free from flash player.
now download the older version that I pointed out to you. Install it. The problem should not be there anymore, I hope.
To install Java clean-completely remove the existing version(s). If using RevoUninstaller you may see more than 1 and both need to go. Now, go to the Java website nd download the offline installer for Windows. Save the file to a folder not the desktop as some folks do. I use a folder specifically named download and set my browser for all downloads to go there. Find the downloaded file and run it. You do not need to be offline from the internet to do this.
For those who think I'm wrong about complete uninstalls of programs, plug-ins, etc--there is strong evidence that this is the best way to insure that there are NO conflicts with prior or buggy versions. In the case of Flash-this is a good example of making sure nothing of a really bad version remains. I also made sure that Firefox was working properly before installing Flash 11.2.0.235 by doing a clean install of Firefox. I do understand that there are people who do not feel comfortable doing this level of work.
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