There are several patches under its patches source directory, and there are different sort of packages, one example is the sed patch to avoid including pocket in the build. The DRM widevine is not included either on the build, though it can be installed if you want it installed (probably there’s a patch for that somewhere).

But I no longer see removing binary blobs being advertised by Librewolf, it’s been a while since I don’t check on their site…

Not true, FF comes with few binary blobs which are removed from Librewolf. Also there are some things disabled entirely at build time, so they are removed from being an option. So it’s not just the settings, and it’s not plain re-branding. Some distros has gotten it wrong, believing that it’s just a matter of settings, but at least on the case of Librewolf and the Tor browser that’s not the case.

That hey depend on FF continuous development to exist is true, that doesn’t mean they just rebrand.

Yes SMGL is still active. You can try joining one of their channels. There are still people looking for source based distros, not sure while Gentoo is the only thing that pops up for them. I used it for some time, and it’s fantastic. Sadly having to build stuff takes too much time, particularly on old, and not performance oriented HW. They had support for binaries, and actually include a binaries grimoire, so you could install binaries that used to take too much time, like Firefox for example. Still it takes too much to keep a source based distro. And if you go all the way, then when changing parts of the building toolchain, like gcc, the recommendation was to build everything so that everything would be built with the more up to date toolchain, that was cool, since SMGL has tools for it, but those fancy stuff take as well a lot of time. There I learned 1st about ccache, hahaha.

Sooo fun, :)

Source Mage GNU + Linux (external wiki)