#ROBLOX Client Launch
###Information [] - Used to improve look and easier navigation
[(code)code] - Code in parantheses is the code before the specified peice of code I want to refer to. ###ROBLOX's URI [ roblox-player: ]
This is an URI (send request to open the roblox client from a website) The "roblox-play" is the name of the HKEY roblox uses, you can find this in regedit (on windows). More information about URIs can be found here: https://msdn.microsoft.com/en-us/library/aa767916(v=vs.85).aspx
[ (roblox-player:1)+launchmode:play ]
I don't know for certainty what the addition sign is actually doing. I'll take a guess and assume it's adding on data to be sent to the ROBLOX Client.