fix: Avoid JS errors from external file from normandy.cdn.mozilla.org (#561)
fix: Avoid JS errors from external file from normandy.cdn.mozilla.org (#561)

* fix: Avoid JS errors from external file from normandy.cdn.mozilla.org

* fix: Disable reader mode UI tour in temporary profiles

mozilla/jpm,alexduch/jpm,mozilla/jpm,alexduch/jpm,freaktechnik/jpm,mozilla-jetpack/jpm,wagnerand/jpm,mozilla/jpm,wagnerand/jpm,freaktechnik/jpm,wagnerand/jpm,alexduch/jpm,mozilla-jetpack/jpm,freaktechnik/jpm,mozilla-jetpack/jpm