I have a new favourite Firefox extension: click2tab.
I can’t count how many times I have pressed ctrl+w in a Firefox textarea, trying to rub out the last word I wrote, and instead been faced with loosing my entire browser. “Grrrr,” is my usual response to this.
In my opinion Firefox should recognize that ctrl+w in a textarea very probably is a Unix person making a bad mistake. Alas, it does not. click2tab does not save me from making the mistake, but it lets me undo the close tab operation. Which is just as swell.