[Sergio526]

Browser Launcher doesn't work either.  Any options to get Chrome Launcher or Browser Launcher to work.  Perhaps a workaround?

I am using browser launcher in Matrix v.19 right now!
It does work. I have Browser Launcher version 1.2.5+matrix.1

It doesn't allow for the useragent string, right? Additionally, it doesn't allow for control (i.e. navigation and exiting), does it?

I got the useragent string working with Brower Launcher on Matrix. I went to the Browser Launcher "default.py" file in its addons folder and added the --user-agent="blahBlahBlah" string to the "bExtra = [" line after all the other "--" commands there. What was weird is that kiosk mode stopped working. I think Chrome expects --kiosk to be called before the --user-agent string, so I also added --kiosk to the commands list between "--no-first-run" and "--user-agent" and that made kiosk work. Of course, that is going to make EVERY page open in kiosk mode with Chrome, which works for me, at least.