@neauoire Ah, well. Now I'm sort of curious, so have just kicked off snarfing a copy of the repo.
(Step 2 of this, in case anyone else wants to play along. https://firefox-source-docs.mozilla.org/setup/linux_build.html)
I think the thing I am most curious about is how easy (or not) it is to build a copy without some controversial feature. E.g. leaving everything else alone, just not build whatever functionality is seen as most obnoxious.