Right now, Local doesn’t know about Firefox Developer Edition. If you have the regular version of Firefox, that should work with Local, but in order for the Developer Edition to be supported, Local needs to have a feature request completed:
If you’d like this sort of thing to be worked on, be sure to up-vote either of these requests so that we can gauge the priority of this against other bodies of work!
Thanks for calling that out, I definitely missed it during my initial read of the topic!
I fired up my Windows machine and installed Firefox and see what you’re saying about not being able to select Firefox as the default browser.
I’ll create a bug that focuses on getting Firefox to be set as the default browser under Windows. As for Firefox Developer, that’s still likely a feature request, but I’ll also link to that feature in case it’s an easy thing to implement when fixing this bug!
I’ve also moved this topic to the “bug” category so that it can be up-voted to help gauge the priority and impact of this bug, so be sure to click the vote button!