For now Firefox derivatives are fine (I use LibreWolf), but many of those derivatives don’t work on macOS because it “fails to verify that this executable is actually executable” (what does that actually mean???)
Not sure if this is what you’re experiencing, but it’s a common thing. Happens to me too, I have to run a command after I update from Homebrew.
It is possible that Apple Silicon users see their recently downloaded LibreWolf flagged as broken or unsafe by the OS.
This happens because we do not notarize the macOS version of the browser: we don’t have a paid Apple Developer license and we don’t want to support this signing mechanism that is put behind a paywall without providing significant gains.
You can remove the quarantine attribute from the Application using this command:
Not sure if this is what you’re experiencing, but it’s a common thing. Happens to me too, I have to run a command after I update from Homebrew.
LibreWolf FAQ: why is LibreWolf marked as broken?