Move not UI-related torbutton.js code to XPCOM component/service
torbutton_init() is the entry point: we should start there, find out which code does not need to be loaded for every window and move it to a new or existing component.
torbutton_init() is the entry point: we should start there, find out which code does not need to be loaded for every window and move it to a new or existing component.