They will also get notified right away on the browser so that they can view new messages, comments, photo tags, and other important stuff. If you’re interested to try it out, assuming you’re a Firefox user, simply get the Messenger for Firefox here and click the “Turn On” button. Do note that the feature will only work on the latest Firefox version. If you’re a little behind, get the newest version of Firefox here. Do you find this feature useful? Let us know your thoughts.