Flashblock is a firefox browser addon to block the flash file while you browsing web pages. i found it when i wanted to reduce the traffic of my home broadband connection and save the usage of data.

Flashblock is an extension for the Mozilla, Firefox, and Netscape browsers that takes a pessimistic approach to dealing with Macromedia Flash content on a webpage and blocks ALL Flash content from loading. It then leaves placeholders on the webpage that allow you to click to download and then view the Flash content.

Flashblock currently blocks the following content types:
* Macromedia Flash
* Macromedia Shockwave
* Macromedia Authorware

Their public support forums can be accessed via:
our mailing list: http://www.mozdev.org/mailman/listinfo/flashblock
or newsgroup: news://news.mozdev.org/public.mozdev.flashblock