Lastpass addon for Firefox is going down the hill. Since the quantum update it's been freezing, slowing down the browser (sometimes to a halt) and many features are not working anymore. Sometimes dialogs open blank and you have to log out and in again. Sometimes you can't edit the vault. Sometimes you click on the LP icon and it just freezes half open.
It used to be an excellent addon but now it seems as they gave up on firefox. I wonder if it's time to move on.