Any new tab I open switches focus to the address bar (which I want to happen), but as soon as a start typing, I can get at most 3 or 4 characters before it loses focus, and no other keystrokes are entered. I have a load of keyword searches set up, rather than using the separate search bar, so I can for example, quickly hit Cmd+T to bring up a new tab then type 'gi [search term]' to search Google Images directly. The problem now is that I can get the first letter, perhaps the first few, but cant type anything else because the address bar loses focus. == This happened == Every time Firefox opened == Unknown, downloaded 3.6.4 to test, has done it on the first use since installing.