Browser settings broken (Firefox 3.05)

[TooNice]

I don't really remember changing anything in my browser settings lately, but it's now broken. Video on YouTube no longer load (but Flash is fine and videos will play if embedded from another website), the 'Search this Forum' (next to the Forum Tools) on Hexus no longer come up with a little pop-up search box; in fact, none of the buttons you can use to change text type/font size/colour/add links/quote/smiles work anymore (clicking on 'more' next to the smilie section below no longer pop up a box either).

The consoles throws a lot of errors like:

Error: vBulletin is not defined
Source File: http://forums.hexus.net/clientscript..._menu.js?v=381
Line: 11

Error: vbmenu_register is not defined
Source File: http://forums.hexus.net/newreply.php...eply&p=1680115
Line: 583

Error: vbphrase is not defined
Source File: http://forums.hexus.net/newreply.php...eply&p=1680115
Line: 848

And a whole lot more and varied messages.

Can anyone figure from the description what might have been changed with the browser?

[vinnyT]

Sorry don't know, but the current ver of ff is 3.0.9 (just in case you don't know).

[TooNice]

Thanks. I might look into updating, but I don't think it'll do much good unless the settings are reset. I just tried running the browser on another account on this PC, and everything works perfectly. So I am pretty sure it's just a browser setting that's broken. It would be handy if someone could clarify what is used for the buttons on the reply boxes on Hexus. At the moment, they are completely unclickable:

[TAKTAK]

The buttons use java script