I have a riddle for you if you have the time.

Last week I found that my site was suddenly behaving differently in Firefox. Up until this point, it looked pretty much the same as Safari. But suddenly every piece of text had inexplicably become bold, and the spacing of my block-level elements was off. Way off. After some rapid refreshing in both browsers to see if something had momentarily glitched out and become cached, I realized the bug was much more permanent.

Thank heaven for Firefox and its myriad extensions.

Over the years, there have been a few extensions that I found critical, but haven’t been updated, X-Ray being chief among them. View Source Chart is another extension that keeps me from switching completely back to Safari. In order to use either of these I keep Nightly Tester Tools around for ensuring backward compatibility with these extensions that have fallen by the wayside…