Firefox experimenting with becoming your default web browser | Digital Trends

[rcjordan]

 users will have the option to 'download as default' via the stub installer marketing page

https://www.digitaltrends.com/computing/firefox-has-a-new-tactic-to-win-the-web-browser-wars/

[ergophobe]

Nothing can truly be a default browser on Windows except Edge.

Similarly, nothing can be a true default browser on Apple except Safari.

Try though you might, some things will always open in Edge or Safari.