These are some basic tweaks to speed up Firefox that have been tried and true for some time now. I haven’t seen these collected in one place recently, so if you have Firefox and want to improve its performance, try these steps. If you have a broadband connection (who doesn’t?), you can speed up your page loads considerably using these steps. Basically you’re allowing Firefox to load multiple things on a page instead of one at a time. By default, it’s optimized for dialup connections (lowest common denominator) so here’s what you need to do to fix that.
So give those a go, and don’t stop there, there’s plenty of Firefox add-ons to download and explore with; whatever you want to do online, there’s likely an add-on that’ll make it easier/better/faster.