fontreplacer

Open source, and does exactly what I wanted. I don't need to replace Arial, but I *do* need to replace Consolas with Inconsolata. And now I can replace other fonts with various open source equivalents, as well! It seems to have many options I didn't even think about, such as timed repeated replacement (for websites that set the font with JS I presume, and keep setting it wrong). Not sure how well that works, though thankfully I don't (yet) have a need for it. By the way, if you do get around to replacing the regex matching with something more 'user friendly', please keep regex as an option still. I'm not currently using that option (I'm just using the extension to replace fonts I don't have with ones I do have that should be equivalent), but in other extensions I use for various purposes I've often cycled through extensions until I found one that accepted regular expression matching.