Firefox 61 has a great new feature on macOS, and I don’t think it’s getting enough attention. Maybe it’s not a big deal for most other users, but it is for me!
Firefox now supports the macOS share menu. This means you can send the current page you are viewing to another application. For instance, you can add a link to your Things 3 or Omnifocus inbox, add a page to Apple Notes, send a link to Evernote, send a link to someone using messages, or share a link to a social network.
To share a page in Firefox, open the Page Actions menu (aka. the three dots), and go to the Share menu.