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How to Switch From Chrome to Firefox (and Why You Should)
(lifehacker.com)
A place to discuss the news and latest developments on the open-source browser Firefox
They just patch Firefox
That's....not really an answer to the question asked.
Arkenfox is a set of Firefox flags.
Librewolf/mule is essentially pre-packaged Firefox w/arkenfox and some things stripped out.
The devs work informally on it which is why some releases lag. Like the jump to v128 lagged on mule because Firefox switched the way their repo worked and mull is based off of the Firefox source with some build scripts to change the logo, branding and add arkenfox settings by default.
The flags used by Arkenfox are largely funded by the tor project as they work to upstream many of the tor browser changes back into Firefox which enables efficiency for future tor builds.
This benefits everyone as the privacy preserving features of tor can be used off of the tor network too.
True but they don't need a ton of funding