So as you may have read below, I am now happily set up with Firefox 3 RC1 on my Mac and have had no troubles as of yet, bar one.
I’m a massive tab user and usually have at least 5 open at any one go (like when you see somehting useful and think to yourself ‘Oh I’ll have a look at that later’ and then leave it in it’s own tab) and there was no apparent way to esaily navigate through these tabs via the keyboard, which is the biggest annoyance after moveing from Safari which use Cmd+Shift+Left or Right Arrow/[,] all until I stumbled across this post on WordPressGarage which stated that Ctrl+the number of the tab, ie, Ctrl+2 for the second tab selects the corresponding tab and so after translating this to Mac – replacing Ctrl with Cmd – I am now happily set with browsing through the myriad of tabs. 
