Firefox 社群討論區

I would like to swap the order of the first 2 items on the Bookmarks Context Menu - that is "Open in New Tab" should be second, and "Open in New Window" should be first.

I'm able to do this on the "regular" context menu with the following code...

#context-openlink { 
   order: -1;
}

But I cannot find the correct selector for the Bookmarks Context menu (see attached image).

I have tried code (to no avail) such as the following...

#placesContext-openlink { 
   order: -1;
}

#BMB_bookmarksPopup-openlink { 
   order: -1;
}

Any help is appreciated!

Thanks.