Since switching to Linux I’ve had one issue that has really caused me grief over the past few weeks, and it’s been with Firebug, which to a web-developer is a pretty indispensable tool!
I compiled Firefox 2.0.0.11 using the ebuild from Gentoo Portage, and then installed the Firebug extension, but once Firefox had restarted to complete the installation, Firebug wouldn’t open at all. Whenever I tried to open it I received various error messages in Firefox’s error console including ‘permission denied to call method location.tostring’. Upgrading to Firefox 2.0.0.12, and Firebug 1.1.0b10 didn’t help.
After some digging I found a bug report that described exactly what’s happening to me. So I added ‘mozdevelop’ to my Portage USE flags, and then recompiled Firefox and now Firebug works a treat!