It's come to my attention that the only URLs I can add to the menu must begin with http and https.

I'd like to be able to add links to open applications like for example:

irc://swiftirc

This would open the SwiftIRC Network using an IRC Application.

ts3server://voice.teamspeak.com

This would open a TeamSpeak 3 Server.

jagex-jav://classic2.runescape.com/jav_config.ws

This would open the Legacy Client to play RuneScape Classic.

rs-launch://www.runescape.com/k=5/l=$(Language:0)/jav_config.ws

This would open the NXT Client to play RuneScape 3.

I'm sure there are other examples of different applications that can be opened this way most people could benefit from.

I'm glad to see this got tagged as planned.

I also found another one any gamers would love to use:

steam://run/205890

This would open Chronicle: RuneScape Legends on Steam.