This extension for Firefox 57 barely works. Whereas previously LastPass would automatically fill in the fields and connect to most websites without user intervention, it now does that for none of them. At the very least, one has to scroll and find the appropriate site and click on it to enter the data fields. In most cases, a second click is required to send the data to the site. I have found at least one site where the new extension refuses to display or enter the user or password, requiring that it be done manually. After LastPass support's suggestion that I use the "save all entered data" for this site failed to work, it was suggested that I install Chrome and try the extension for it.

Firefox announced its new standards for FF57 extensions in February. LastPass did not release this extension until the day before FF 57's release and the extension it released is full of bugs. When I filed a support ticket as a premium user, LastPass acknowledged that they were aware of these issues. However, it was made clear that there is no target date to fix them. Despite the foregoing, no attempt was made to warn users about the lack of functionality of this extension. To say that LastPass has "dropped the ball" in its release of this extension is to put it mildly.

Was working with Firefox Quantum (57) earlier, now unable to login. Also, unable to save email since Firefox 57.

Not working on Firefox for android. Not loging in to lastpass.

Entirely non-functional. Takes dozens of tries to log in, then once it has, pops up desktop UI elements in tabs instead of incorporating into the mobile browser in any way. Even within that menu, nothing actually responds to click. Have had a support ticket ignored for a week now.

Unable to log in

Sorry man

This add-on doesn't install on Android Firefox 57.0

Cannot login

unable to import password from firefox or csv.
import tool not working.

Cannot login

Uninstalled. Unusable in FF 57. Running Bitwarden now and liking it.

This add-on has taken up too much cpu resources for years. If you see only the login form in idle state, lastpass constantly eats cpu. And there is no improvement. Do not use it.

After years of trying to make LastPass work properly, I tried Dashlane and was amazed at how much easier to use and more helpful it is.

Last pass don't save master password.

Ridicolus

Used to work fine with firefox, but now it's a pain. Cannot save secure notes that require reprompt, cannot use shortcut to vault or to sites, does not fill correctly on sites that used to work, have to log in twice(!!!!), and more :-(

Firefox und LastPass passen seit der Version 57 von Firefox nicht mehr zusammen. Schade, war bis jetzt mein Passwort Add-on der Wahl. Paradoxerweise wurde dafür der Preis für die Premium-Version verdoppelt.. Mitbewerber wie z.B. Bitwarden wird es freuen.

Firefox Quantum and LastPass are incompatible. A pity, LP was the add-on of my choice. Paradoxically, the price for the premium version was doubled for it. Competitors, such as Bitwarden, will be pleased.

Doesn't work. Won't log in at all. Simply amazing how LastPass releases non-functional software like this.

Will not complete login on latest Firefox (Android). Can't use it.

Seriously, such a regression for FF Quantum is not acceptable. It has been months or even years old APIs were deprecated. With the current set of features, the extension is cumbersome and not useful. Where is auto fulfill and copy username/password. Having to go on the site -> EDIT -> Show password -> Select -> Copy -> Paster somewhere else, the workflow is really crazy..

The most consistent inconsistent pail of garbage one can be forced to eat out of. Just ONCE, even after re-installing and updating Firefox, would be nice if Last Pass could auto fill and log into my two email addresses. My blood pressure and gray hair plead with me to abandon this JOKE of an add on!

It stopped functioning properly some time ago. It does not log out automatically, it is not able to fill usernames and passwords, it loses newly generated passwords frequently, not able to save new sites, etc., etc. This add on is a piece of junk.

With the current bugs (constant re-authentication, no copying username/password, no auto-fill) this extension is useless for me. Due to missing Firefox 57 support of this and other addons I have kept Firefox 54 for now with all auto-updating disabled. For all those in the same boat who want to also revert the LP extension back to a working version, here's the link:
https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/versions/