I came here in the search of finding older versions of Mozilla Firefox, because I seem to be having problems with the latest one (1.5.0.2). However, the ones I found here were too old, so I Googled around and on Mozilla's site somewhere, there is a link to a Public FTP where they host old versions of Mozilla Firefox.
Just go to the following link, click the version number you want, and then look around for the .exe file you need. In some version folders (later ones) you will have to click your Operating system and then your language (for America, it would be en-US. I'm sure you could figure it out for other languages)
http://ftp.mozilla.org/pub/mozilla.o...efox/releases/
Hope this helps.
Edit: I guess somebody already made note of this:
http://www.oldversion.com/talk/showthread.php?t=3231
Nevermind then, though, that might help make the site staff more aware that there are older versions easily available for download. I'd appreciate seeing some more older verions on the site.