LastPass was giving me problems after the Firefox Quantum update. Every time I closed my browser and then re-opened, I would be logged out of LastPass. Sometimes while using the browser the LastPass icon would change from red to yellow or black and give me an error message about my internet connection. Here is what worked for me. I clicked the LastPass icon, logged in, and went to 'more options', then 'about LastPass'. That screen gave me the version number I was using and also the option to download the binary component. After downloading the binary component, LastPass has been working properly. Good Luck!
NEVER MIND THIS POST! SOMETIMES IT WORKS, MOST OF THE TIME IT DOESN'T!

The Web Extension version is really rough around the edges and is missing quite a bit of functionality due to the lack of binary extensions. Terrible move on LastPass' part considering firefox is still a major browsers, and quantum is a really good update.

Update: Lowered rating from 2-starts to 1-start. The autofill functionality has been really really bad on media heavy websites. That combined with the lack of binary features makes this version nearly useless.

Problems with Firefox 57

Nothing about this extension works in Firefox Quantum.

With the update to Firefox Quantum, LastPass removed one of the best features from the add-on. In the past, users could look at a site in the menu, click more options, and copy username/password. I used this all the time for desktop apps but now, users have to find the site, go to more options, edit the site, show the password, and then copy it. The way it used to be was so much easier and it saved, cumulatively, quite a bit of time.

Those features will be re-enabled in the future but, in my opinion, LastPass should have been ready for the update with all the features working and the majority of bugs fixed. Mozilla gave add-on developers ample time to update their add-ons so they were fully compatible with Quantum and LastPass didn't take advantage of that, it seems. In addition to that, the Firefox extension itself didn't pretty much work except for autofill for a few months before the release of Quantum. The service is great but the company . . . not so much.

If they had been ready for 57's release with most features working and they hadn't said, "we'll just wait for Quantum before we go through all the trouble to make it usable in 56 just to redesign it for 57," I would give the extension 5 stars/. I've been using LastPass for three years and I love the service . . . I'm just not really liking the company that much anymore.

Seit dem letzten update funktioniert das Kopieren von Benutzername und Passwort, per rechter Maustaste, nicht mehr.

Why there is no quick copy password in search like in Chrome and Edge? And the design is super old.

It's good, but not great. Filling forms can be hit or miss, the service often has issues syncing with the server, the search doesn't auto-focus when opening the extension, and worst, there is no easy way to contact support if you have a problem.

The WebExtensions version of this addon (for FF57+) has some minor bugs and is missing some quality of life functionality. The older version of the addon was rock solid. Hopefully LastPass will resolve these issues.

Do yourself a favor, and switch to LastPass instead of using the built in utilities in Chrome or Firefox, you'll be glad you did. The LastPass add-ons and extensions are great, they do exactly what you want, and get out of your way the rest of the time.

Note to Lastpass and Logmein: You ought to be ashamed. Because good grief -- what a mess. Lastpass in Firefox was cool, useful, and glorious -- until LogMeIn gobbled them up. Now it's inconsistent and VERY buggy.

It won't keep me logged in, for instance, despite it explicitily being told to keep me logged in. Sometimes the icon on the toolbar works, sometimes it doesn't. It can't seem to always recognize the site I'm on; nor does it autofill the correct password.

Send in a trouble ticket and the dope says he's replicated it and it's been sent to the developers, something that happens regularly.

Save your money and try Bitwarden (Google it). It's new and not as robust as I'd like, but it's free ($10/year gets you the premium) and the developer actually responds and adds your suggestions to his to-do list.

Don't lock your p/w data up with this propriety (and not always secure) solution. Suggest the free (opensource) "Keepass" (which also has nice multiple (quantum compatible) add-ons for automatic p/w filling.

Excellent Password manager. I use it on Windows, Linux, iOS and Android (also works on Mac OSX but I don't currently have a Mac). Great way to share passwords securely with family members, even the option to share without revealing the password. Well worth the premium service (required to use the mobile apps and I believe secure sharing, but not 100% sure)

Works nicely, but not yet as functional as the Chrome version. E-mail is not being saved even when the save e-mail checkbox is ticked, and passwords cannot be copied easily.

it does the job but I noticed the chrome version has better functionalities
- you can copy and paste the password.. at the moment I need to click to edit to copy it... annoying
then I see it does not do autocomplete on pwd automatically even there is only one entry user so I need to right click in the box and select it ..