It was. But he later fully transferred (everything, including stars issues and whatever) the repo to Aljoudi (you can do that on GitHub) so it was under Aljoud

It was. But he later fully transferred (everything, including stars issues and whatever) the repo to Aljoudi (you can do that on GitHub) so it was under Aljoudi's namespace. Then, Hill forked it back, which eventually became the repo for uBlock Origin we have today. It doesn't show "forked from xxx" any more today for reasons I don't know (maybe he recreated it?), but you can still see it in the archive version of it I linked above (you can also check older dates and Chris' one, to show the transfer more clearly).