Adobe Flash and other plugins are not supported yet, according to http://www.mozilla.com/mobile/4.0b2/releasenotes/index.html '''Quote:''' (Under Known Issues) ''Adobe Flash and other plugins are not supported yet''. '''Quote:''' (under Developer Questions) '''Does Firefox on my phone support plugins?''' ''There is no plugin support in Firefox 4 Beta for Android and Nokia N900. On most Web pages that use the Adobe Flash plugin, the performance of the plugin didn't meet our standards, and the interactivity and performance of the entire Web page was negatively impacted. This was especially felt on pages with multiple instances of the plugin. Advanced users can enable plugins for experimentation and testing purposes only. '' Related topic: http://support.mozilla.com/questions/767909