user_prefs.json

{
    "dom.disable_open_during_load": false,
    "dom.allow_scripts_to_close_windows": true,
    "browser.rights.override": true,
    "browser.sessionstore.enabled": false,
    "browser.sessionstore.resume_from_crash": false,
    "browser.shell.checkDefaultBrowser": false,
    "browser.startup.homepage_override.mstone": "ignore",
    "app.update.auto": false,
    "app.update.enabled": false,
    "app.update.service.enabled": false,
    "toolkit.telemetry.prompted": true
}