Mozilla is set to extend its new plugin check feature, which debuted in Firefox 3.5.3 and would check on first run if Adobe Flash player was up to date.

The feature which was so successful, is expected to be expanded in Firefox 3.6, covering other plugins such as Adobe Shockwave Player, Adobe Acrobat Reader, RealPlayer, Windows Media Player and Java.

While not fool-proof, it’s certainly a forward step for browser security. More information on the plugin check feature can be found on the Mozilla blog.

Mozilla has updated both Firefox 3.5 and Firefox 3 to close several security holes, 3 of which were rated as critical.

A full list of changes can be found in the Firefox 3.5.3 and Firefox 3.0.14 release notes.

The update will be automatically pushed out to current users, or can be downloaded directly from the Firefox website.