You can set up eg. a 3-finger touchpad tap gesture for the middle button in KDE Plasma, I'm assuming the same should be possible under GNOME. No need for fancy touchpads.
Great idea! I was thinking about something similar too. Having multiple browsers doesn't have to suck...and having to fiddle with galternatives or KDE systemsettings isn't ideal.
May I suggest you to add a small (and optional!) config file to automate your UI - like e.g.:
[Sources]
Telegram=chrome profile B
Discord=epiphany
[Destinations]
https://www.google.com=firefox profile A
If the config is there, you'd then only show the UI when neither sources nor destinations match (regexes). This would make it a must have tool IMHO :)
Yes, I'd love to do that. There is in fact already an app that does this on macOs (https://github.com/johnste/finicky). And you can chain them so that finicky runs first and then calls a chooser UI "browser" as a fallback. But I would like to incorporate it into my app so that I don't have to run two apps (and so that I can make it work cross-platform).
