Suggestion: per-domain settings for opening links in external apps

[Flanr4]

Description:
I suggest adding a second checkbox to this dialog window:

with text like "Always open links to this site in its app"

If this option is added, there should also be a corresponding list of apps for which this preference is saved, accessible in settings as a submenu under this item:

Context:
Currently, the browser has a global option to "always open links in external apps". What I'm suggesting is the ability to save this preference per domain, giving users more granular control

[FaFre]

I tried to implement this already, but stopped once it turned out that Gecko is not supporting it on a per-app basis and is not having dedicated callbacks that fire reliably. It needs some more work writing custom patches for the engine.