gutterContextMenu event not fired in Firefox

Hi,

GutterContextMenu event is not fired in firefox. But it does in chrome and opera. Only the click event is being fired on right click on gutter.

Here is the code i am using

 editor.on('gutterContextMenu', function(cm, line, gutter, event) {
          onGutterContextMenu(id, cm, line, gutter, event);
 });

Here are the versions i am using. Firefox 61.0.2 MacOS High Sierra 10.13.4

Please let me know if you need more details.

[adrianheine]

Marijn usually does one release per month, so there should be a release pretty soon.

[rakeshrohan]

@marijnh . Great. Will you create a release for this patch?