This sounds similar to a problem another user reported with Adobe Edge Animate: The animation on my website doesn't run in Firefox any more while it runs perfectly on Chrome and Safari. I don't think we got anywhere close to solving that one.

A similar question was posted on Adobe's forums, but appears to be unsolved: oam doesnt show in FIREFOX as soon as I add video into the animation |Adobe Community.

On another subject your plugin list (Question Details > More System Details) shows:

• Trovi Search Plugin 1_0_0

I think this might be associated with some kind of hijacker. You could scan your system with this program:

https://www.malwarebytes.org/antimalware/mac/

no solution with the upgrading

ohh no, the problem is nothing solved, oam file is still not appearing ONLY in firefox ...

You can remove the SOLUTION marking from the first reply to make sure people continue to check on this problem.

thanks anyway, its rally strange, sometimes wenn open the first window in firefox it appears, but turn to white with the first reload... If someone have an idea. . .