"A note to Firefox users
With this change, we will temporarily disable the Firefox version of the MozBar. You may have noticed that the Firefox and Chrome versions of the MozBar are not the same. This is due to Mozilla’s review process, and us being unable to get new versions approved despite multiple attempts.
Good news on the horizon! Firefox will start accepting Chrome-based extensions with the release of Firefox v48, which means soon there will be one version of the MozBar. When v48 is released, we will re-enable the MozBar in Firefox. In the meantime you can use the free Google Chrome version."
Two and a half years later, this still appears to have not been fixed. Am I wrong? If not, have you abandoned Firefox permanently?