LastPass is significantly worse on Firefox (58.0.2) than Chrome, which is a real shame. The login dialog is usually too small to see the login form, though it has appeared correctly in the past. It's probably not a good security practice to enter your password into a form you can't actually see! Additionally, site search, when triggered by a hotkey, opens in a new tab, rather than in the dialog, which makes it a pretty big pain to actually use...

Please bring LastPass up to parity with Chrome for Firefox!