Not if you’re a macOS user, in particular one that cares for automation. The lack of AppleScript (the bug report that tracks it is old enough to vote) prevents people from considering it as a daily browser. And I’m not just talking about developers. I regularly steer non-technical people away from Firefox because when they ask why my tools—which they want to use—don’t work on Firefox, I have to tell them the truth: I’d like to support Firefox, but I can’t.