PowerPC fork of Firefox that lasted for over a decade has reached the end of the road


Enlarge / An old PowerBook G4 running Mac OS X 10.5 Leopard, Microsoft Word 2008, and the TenFourFox browser.

Andrew Cunningham

It has been well over a decade since PowerPC Macs roamed the earth—so long that the Intel Macs that replaced them are themselves being replaced by something else. But to this day, there’s a small community of people still developing software for PowerPC Macs and Mac OS 9.

One of those projects was TenFourFox, a fork of the Firefox browser for G3, G4, and G5-based PowerPC Macs running Mac OS X 10.4 or 10.5. Maintained primarily by Cameron Kaiser, the TenFourFox project sprang up in late 2010 after Mozilla pulled PowerPC support from Firefox 4 during its development. And amazingly, the browser has continued to trundle on ever since.

But continuing to backport Firefox features to aging, stuck-in-time PowerPC processors only got more difficult as time went on. And in March of this year, Kaiser announced that TenFourFox updates would be ending after over a decade of development. The final planned release of TenFourFox was earlier this month.

Kaiser’s full post is long, but it’s worth a read for vintage-computer enthusiasts or anyone who works on software—Kaiser expresses frustration with the realities of developing and supporting a niche app, but he also highlights TenFourFox’s impressive technical achievements and ruminates on the nature of the modern Internet and open source software development, saying:

I’m also proud of the fair number of TenFourFox features that were successfully backported or completely new. TenFourFox was the first and still one of the few browsers on PowerPC Mac OS X to support TLS 1.3 (or even 1.2), and we are the only such browser with a JavaScript JIT. We also finished a couple features long planned for mainline Firefox but that never made it, such as our AppleScript (and AppleScript-JavaScript bridge) support. Our implementation even lets you manipulate webpages that may not work properly to function usefully. Over the decade TenFourFox has existed, we also implemented our own native date and time controls, basic ad block, advanced Reader View (including sticky and automatic features), additional media support (MP3, MP4 and WebP), additional features and syntax to JavaScript, and AltiVec acceleration in whatever various parts of the browser we could. There are also innumerable backported bug fixes throughout major portions of the browser which repair long-standing issues. All of this kept Firefox 45, our optimal platform base, useful for far longer than the sell-by date and made it an important upstream source for other legacy browsers (including, incredibly, OS/2).

[T]he biggest investment is time: trying to stick to a regular schedule when the ground is shifting under your feet is a big chunk out of my off hours, and given that my regular profession is highly specialized and has little to do with computing, you can’t really pay me enough to dedicate my daily existence to TenFourFox or any other open-source project because I just don’t scale. (We never accepted donations anyway, largely to avoid people thinking they were “buying” something.) I know some people make their entire living from free open source projects. I think those people are exceptions and noteworthy precisely because of their rarity. Most open source projects, even ones with large userbases, are black holes ultimately and always will be.

Kaiser doesn’t intend to fully halt work on the browser, but he is downshifting it into what he calls “hobby mode.” He will continue to backport security patches from newer ESR releases of Firefox and post them to the TenFourFox Github page, but anyone who wants to use these will need to build the app themselves. Kaiser also won’t commit to providing support for these additions or providing them on any kind of schedule. Other developers are also welcome to continue to release TenFourFox builds on their own.

There are many reasons why you wouldn’t want to browse 2021’s Internet on a PowerPC Mac, even with a fully supported browser. G4 and G5 processors are an order of magnitude slower than modern Intel, AMD, or Apple Silicon processors, and trying to load a bloated modern website on a machine with just a gigabyte or two of RAM is an exercise in frustration.

On top of that, it has been years since Mac OS X 10.4 or 10.5 have received security updates, and most third-party app developers have long since moved on. Old computers can still run old software, as I learned when I tried to run Mac OS 9 in 2014, but going online or trying to interact with other computers is trickier. TenFourFox and its development blog are testaments to just how hard it can be to swim against that tide.



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Written by bourbiza

bourbiza is an entertainment reporter for iltuoiphone News and is based in Los Angeles.

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