I've obviously changed a setting in Firefox but I don't recall what I've done.

Text displayed in Firefox runs over the edge of the window that its in.

I don't have the problem in safari.

I konow the explanation is clumsy so I've attached a partial screen shot to illustrate.

Anybody know what I've done and more importantly how to fix it?

Cheers

Not a Firefox expert, but here's what to do to reset it to default settings:

1 Start Firefox,

->Bookmarks->Organize Bookmarks->File->Export... and export them somewhere, like your desktop.

2 Quit Firefox.

3 - delete the Firefox folder here:

[your home folder]/Library/Application Support/Firefox

4 - Start Firefox - it should now have default settings, then go to Bookmarks->Organize... as before and import your bookmarks.

After this, you will have the default settings back. I don't know if that will fix the problem though....