Like Chromium, Firefox serves as the base for dozens if not hundreds of alternative Web browsers, such as Basilisk that's not particularly fast at rendering websites but may appeal to fans of how older Firefox versions looked nonetheless.
SeaMonkey is one such alternative browser. It sports retro looks that Internet Explorer users should appreciate, with big buttons, dedicated tool tabs and status lines. SeaMonkey's previous versions were noteworthy for their compatibility with older macOS and Windows versions; think 10.12 and 7, respectively. Better yet, x86 builds were available, too, not just the usual x86-64 ones. While not the most stable app in the world, this still was a viable option for those using older operating systems and computers. YouTube and Google Mail worked perfectly fine, at least.
32-bit OS users are now left out in the cold, as version 2.53.22 is only available in 64-bit Linux, macOS and Windows flavors. Worse still, just like 2.53.21 and 2.53.20 before it, the new version does not render certain websites the right way (which is something the developers openly admit, to their credit).
Thankfully, version 2.53.21 remains available for download.
Like most projects of this kind, SeaMonkey is run by a small number of individuals with limited financial resources and manpower. If you are a software developer, you may be able to help.
In other news, Supermium - another Web browser compatible with older Windows operating systems, making use of Chromium 132 as of November 02, 2025 - has not received an update in over 2 months.
Chromium Legacy, a Web browser for older macOS systems, has not been updated since H1 2024 but remains a solid option for those who'd rather keep on using an older build of macOS than install a newer one via a hack. Chromium Legacy 108 works great on Mac OS X 10.10, just as a quick example.






