Works with hackrf.app, was able to update firmware using FF now. Very nice. The download link for the native app didn't work for me so I had to manually download it from github but after that it worked flawlessly and just like in a Chrome browser.
The native app must be installed manually, it cannot be bypassed - this is a limitation of Firefox and how extensions work. There are other add-ons that require installing apps manually, such as Google Remote Desktop.
