Every time that I want to go full screen with an enbedded video firefox freezes and doesn't expand

Question

Every time I try to go full screen with an embedded video or video game Firefox freezes and stop working

Answer 1

1. Update firefox to the latest version 2. and disable real player in menu->addons->plugins.
Recent crashes of certain multimedia contents (this includes Youtube videos, certain flash games and other applications) in conjunction with Firefox 13 are most probably caused by a recent Flash 11.3 update and/or a malfunctioning Real Player browser plugin.
In order to remedy the problem, please perform the steps mentioned in these Knowledge Base articles:
[[Flash Plugin - Keep it up to date and troubleshoot problems]]
[[Flash 11.3 crashes]]
[[Flash 11.3 doesn't load video in Firefox]]
Other, more technical information about these issues can be found under these Links:
http://forums.adobe.com/thread/1018071?tstart=0
http://blogs.adobe.com/asset/2012/06/inside-flash-player-protected-mode-for-firefox.html
Please tell us if this helped!
Please check if all your plugins are up-to-date. To do this, go to the [http://mozilla.com/plugincheck Mozilla Plugin Check site].
Once you're there, the site will check if all your plugins have the latest versions.
If you see plugins in the list that have a yellow ''Update'' button or a red ''Update now'' button, please update these immediately.
To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.