Because why would you do that? Do you also have a chain store where serves pour sulphuric acid over your cup to show that it doesn’t melt?

Ok, thanks for clarifying. I was asking for a statement in support of your initial claim that turned out to be completely wrong: they didn’t duplicate the code upon creation of the project, they didn’t create a fork under their control, and they don’t make independent changes to the code.

What they are doing is customising the current code of Firefox at the time of compiling the LibreWolf project. If you really insist that that is a fork, then one of us doesn’t understand what a fork is, and I’m not going to continue a fruitless argument.

Interesting, because there is no mention of that anywhere on their website. Indeed, the workflow overview in their source repo clearly states that in order to build LibreWolf, you need the current Firefox source tree, and this is reflected in the Makefile, which fetches the Firefox source tarball associated with the same version. Nothing points to a repository they created at any prior point.

Can you link to some official statement that supports this claim?

LibreWolf is not a fork, though. It’s a customised version of FF, so every shit they introduce has to be painstakingly removed by the LW team, provided that is even possible. (See Manifest V3 in Chrome.)