"Explain." OK.
1) No Firefox fork is doing large-scale engineering work on the browser. They're all small teams whose main contribution is things like different configuration settings. If Mozilla dies, these forks will all die too.
2) Some forks consider it a feature that they keep old, insecure APIs Firefox itself abandoned because they could not be secured (NPAPI, XUL, etc.) Mozilla could not secure these APIs; forks aren't going to be able to. Most don't bother trying.
3) You're still running on Mozilla code, so your trust model still includes Mozilla. Now it just also includes a third party. Do you trust them? Why?
@rail_ @jalefkowit Tried Floorp as a drop in replacement and similar to firefox and librewolf as a user you still have to change pretty much ~100-200 settings so it wont ping back to the mothership (google, mozilla). In that sense they are all still very much the same as Firefox. It would be great if these alternatives actually configured it such way to take mozilla and google 100% out of the loop (changing default search to duckduckgo only doesnt count)