The mixed opinions on Firefox as of late came to pass because people naturally set different priorities. > Ghacks comments are mostly negative, though it depends on the period, and Reddit’s mostly positive. The beta release is mostly for beta and nightly users of Firefox.

LastPass plans to release the WebExtension version next month to make sure that Firefox users that use a release version of the browser can keep on using the add-on and service associated with it. The binary component controls features such as attachments to secure notes, importing and exporting of data, additional encryption at the OS level, importing from Chrome, Opera and Safari password managers, autologoff functionality, login state sharing, copy password or username from vault, copy password from Password Generator, and fingerprint authentication.

Any feature requiring the binary component won't work. The binary installer of LastPass cannot communicate with the WebExtension yet.You can check the version by clicking on the LastPass icon, and select More options > About LastPass from the menu. This means that it is necessary to reconfigure LastPass after installation.

Firefox users who run LastPass 4.1.54 or earlier will have their local preferences reset during the update.

Add lastpass extension to firefox