It's the only browser I have installed besides Safari, and my default browser but instead of just opening the link with my default browser, it advertises these other browsers to me and makes me click 'Default browser app' by default. wtf I'll be turning that off, should have never been a feature.
Click "Default Browser App" on this screen. That will open the link in Firefox if it is configured as your default app. I have the same issue using Brave.