Is there a plugin for Firefox or something else that can convert math TeX to vector (non-raster) displays in the browser? Wikipedia/Mediawiki (and lots of other

Is there a plugin for Firefox or something else that can convert math TeX to vector (non-raster) displays in the browser? Wikipedia/Mediawiki (and lots of other systems) converts equations to PNG, but they get pixelated when they're scaled up, they don't print well, and they don't look beautiful like a TeX PDF does. In my math courses recently, I've come across lots of things that don't have any good explanations on the Web. I'd like to write a bit about them on my site to help other people studying the same things, and I'd like the equations to look really nice.