If no webbrowsers were found _tryorder would be empty, cmd would never be set and the "del cmd" would fail. Fixed.
If no webbrowsers were found _tryorder would be empty, cmd would never be set and the "del cmd" would fail. Fixed.

2.2.1 candidate.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator