Handle the transition to the new Firefox repository

Firefox has a new home!

The big problem (for us) is that Mozilla decided to abandon gecko-dev's history (the git mirror of previous Firefox's home: Mercurial).

I added the new remote to a clone I had, and it's currently 12GB of .git, which is definitely on the big side.

How can we handle it?

Edited Apr 16, 2025 by Pier Angelo Vendrame

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