This extension is a mess and seem like it has been discontinued, as it lacks a lot of the core functionality it once had, such as the ability to copy/paste passwords wit one click.
Editing sites also doesn't work most of the time -- a blank tab opens.
The built-in vault is also borderline dysfunctional.

Sad!

Support for Firefox on Android was discontinued. But you have to go looking for that info.

The extensions still installs but it "loads forever" on the log-in screen.

If it's not supported, it shouldn't install in the first place. Lastpass is wasting people time.

fix courtesy of lastpass fourm user: wnfaulkner

Installation of the binary component is required for the copy username/password features.

Kindly try if the following helps:
1. Uninstall LP on Firefox https://lastpass.com/support.php?cmd=showfaq&id=185
2. Clear Firefox's cache and cookies https://support.mozilla.org/en-US/kb/ho ... efox-cache
3. Download the universal installer https://lastpass.com/download/cdn/lastpass_x64.exe
4. Restart your device > run the universal installer normally
5. Enable cookies https://lastpass.com/support.php?cmd=showfaq&id=11472
6. Install the binary component https://lastpass.com/support.php?cmd=showfaq&id=5576

The extension gradually got worse and worse. Right now, using Firefox on Ubuntu, it’s basically dysfunctional. Clicking the extension icon won’t do anything. I have to go to the vault via the context menu to obtain my passwords.

Additionally, the extension for Firefox for Android was discontinued. The wide device and browser support was precisely the reason why I picked LastPass.

I like the desktop version and would give it 4 stars, losing one only because it seems bothered by Firefox and does not automatically remember even my username. However, the version for Firefox Android is utterly worthless, and as of mid January 2018, LastPass posted on Firefox dicussions they were abandoning their extension on Firefox Android except for Firefox Focus. Even though I am currently a paid premium user, I see no sense in suppoting this program any longer. I've tried Keeper and it works so I'm migrating to that program.

Latest addon update (4.9.2) works nicely on firefox ESR.

best password manager

Most complete password manager out there.

Nice

Mostly not working in Firefox. Can't "edit" or copy username/password.

disconnects randomly, blank screen when trying to edit entries , its just painful to use

Stopped working in Firefox to launch 'Edit'