Testing your web sites for cross-browser compatibility? Good! Getting confused about what version of browser you're looking at? Not so good ...
While writing the HTML Reference for SitePoint, this was an ever-present problem, so I adapted all the browser icons using a consistent typographic treatment (Cooper Black, in case you're interested). They helped me, so they might help you too.
How to Change the Icons on yer Mac ...
The video below, in all its blurry wonder and non voice-over professional nature should at least give you a fighting chance at working out exactly what the heck you can/should do with these icons.
Which should make those CMD+Tab moments with heaps of browsers open a lot more clear to decipher!
Now Includes Linux-friendly PNGs :-)
My esteemed colleague Stuart Langridge has suggested that this can also work nice for Linux users, and he's put together a screencast of his own showing how to do it.