I love Firebird unreservedly, but I’ve been plagued by a particularly annoying bug recently. For some reason whenever I click on a page, a blinking cursor appears just as if I were editing the page. I haven’t had much luck searching Bugzilla, so I’m going to try reinstalling. I wonder if something was corrupted, because I’ve been using Firebird 0.7 for awhile and this bug has only recently cropped up.
Update: Simon Willison points out that it’s a feature that you can turn off with the F7 key. According to this page, it’s called caret browsing. It’s designed to be the ultimate in mouse avoidance, apparently, enabling you to move around on the page and select text without taking your hands off the keyboard.