Can't open devtools panel from fxr:// kiosk mode

[jdm]

Loading a URL with fxr:// hides the URL bar, which also hides the devtools button. We should add a separate protocol handler for kiosk mode, and allow one protocol to open the app directly to a target URL without otherwise changing the app's behaviour.

[paulrouget]

What is important here, showing the console, or showing the devtools port?

We could also enable voice command.

[paulrouget]

I'm leaning toward 2 options:

• voice command to show the navigation bar, or
• use 2 protocol handlers: fxr:// and fxrmin://

[jdm]

I think two handlers makes sense.