Flashblock
Flashblock 1.5.11.2 for Windows
Lorenzo Colitti, Philip Chee Browser & Email / Browser Tweak
Block Flash in Firefox
Never be annoyed by a Flash animation again! Flashblock will easily block flash so it won't get in your way, but if you want to see it, just click on it.
Firefox

Software Summary:

You can run Flashblock on Windows operating systems. Flashblock is a software product developed by Lorenzo Colitti, Philip Chee and it is listed in the Browser & Email category under Browser Tweak. Flashblock is a free software product and it is fully functional for an unlimited time although there may be other versions of this software product.

Alternatives in Browser & Email on Windows