My first greasemonkey
Don’t you find it annoying when sites set numeric access keys and when you press Alt-2 to change tab you get the side effect of also changing the page you was reading?
This is an old bug reported the first time for Mozilla, back when Phoenix Firebird Firefox didn’t even exist, but to date no fix has been released (eh, the wonders of multi-platformness).
My first greasemonkey script fixes this annoyance by removing the numeric accesskeys from the page.
Accesskeys are a strange feature in web sites: they are invisible, so you are not using them unless the site developer has been smart and displayed them himself, and they cause these kind of annoyances by triggering when you don’t expect.
The browser should show them in some way, maybe with an icon or a message in the status bar, or a (timed?) yellow notification like the one you get when popups are blocked.