1483967644032	addons.webextension.<unknown>	ERROR	Loading extension 'null': Reading manifest: Error processing commands.keyTestF1.suggested_key.default: Value must either: match the pattern /^\s*(Alt|Ctrl|Command|MacCtrl)\s*\+\s*(Shift\s*\+\s*)?([A-Z0-9]|Comma|Period|Home|End|PageUp|PageDown|Space|Insert|Delete|Up|Down|Left|Right)\s*$/, or match the pattern /^(MediaNextTrack|MediaPlayPause|MediaPrevTrack|MediaStop)$/  Log.jsm:753