You gotta check this out: Macintosh Web Browsers Past and Present! The author, Darrel E Knutson, starts the page thusly:
Welcome to yet another list on the Internet that once again shows that some people have odd interests and priorities or simply too much free time.
This list contains only publicly available browsers that work on Apple Macintosh hardware running any version of any Macintosh operating system.
I have been maintaining this selection of Mac browsers since 1994.…
Ever hear of Maxthon? Sleipnir? Vienna? Click the link and check them (and all the others) out.