Suddenly Tor Browser is not the default browser anymore

In one of my computers, I've setup Tor Browser to be the default browser to open links from other applications where I can't easily copy the link manually. This usually makes things more convenient.

After upgrading to TB 7.0 I realized that all links are being opened by Firefox instead, while still labeled as Tor Browser on the Application Launcher menu.

#22547:launch_app.png, 300px

I tried going to about:preferences page and try to make Tor Browser default again, at first the Make Default button didn't seem to function but after realizing there was a "pop up" window under the current active window (this is probably MacOS problem?), it seems like I have to choose between "Tor Browser" and "Tor Browser", which is pretty confusing because clearly one of them means "Firefox" and not "Tor Browser".

#22547:about_pref.png, 300px #22547:TB_vs_TB.png, 300px

Seems like something's triggering MacOS to think Firefox is Tor Browser or the other way around. Either way, it seems a bit dangerous especially because of the similarities between FF and TB look and feel. I bet most people won't even realize the links are opened in FF and on clearnet.