Fix for right click issues on Firefox
Fix for right click issues on Firefox

as reported here: https://groups.google.com/forum/#!msg/angular/LAk9oZqRx24/sWKr5jFJQ1AJ

marcoslin/angularAMD,alairjt/modular-home,charlie77/angularAMD,charlie77/angularAMD,aSimpleMan/angularAMD,freedomdebug/angularAMD,alairjt/modular-pkg-1,paulodrade/angularAMD,aSimpleMan/angularAMD,the-unsoul/AngularAMD_TEST,paulodrade/angularAMD,kannaiahchinni/angularAMD,alairjt/modular-home,freedomdebug/angularAMD,marcoslin/angularAMD,alairjt/modular-pkg-1,the-unsoul/AngularAMD_TEST,kannaiahchinni/angularAMD