Stopped working in Firefox (56 and 59, desktop and laptop) and Waterfox (56) today. Clicking on toolbar icon shows a white triangle below toolbar icon and nothing pops up - no Vault, no nothing. Windows 8.1 64 bit. Working fine in Chrome, Vivaldi, and Opera latest versions. Removed, reinstalled older version, it worked briefly then back to white triangle below toolbar icon.

Update: Last Pass no longer saves new site logins. I get message that there was an error.

Otherwise, been using it for years and love it.

not usable any more
4.9.0 doesnt work
installed 4.7 again. OK

I can't open it in Firefox 52.7.3 (32 bity)
Instaled, but I Can't use it....

I us this everyday on all my device

Not usable in Android. Getting an infinite spinning wheel when try to log in.

It sometimes doesn't want to insert my login details, but v4.9 works only with Firefox Quantum for me.
I normally use Cyberfox, based on Firefox 52 ESR, and had to revert to version LastPass 4.7.1 since 4.9 does not work in Cyberfox.

变差了，原来的功能都给阉割了

I will change this rating to 5 if you bring back:
- the "Copy password" menu item
- and when I click on the LastPass icon put default focus on the "Search LastPass Vault" textbox, so I can start typing at once without clicking on it

These features used to work before the Firefox Quantum release...

Didn't work. Extension menu was shrunken. probably a dpi problem.

Abject. Keeps breaking, fails to fill in passwords on some sites, forces me to copy/paste from the clipboard. No software has made me curse louder or longer, and I pay money for this. I've been a subscriber since 2014. The quality has got steadily worse, I'm uninstalling it and cancelling my subscription even though it has almost a full year to run.

Generally, I like this tool. It's not much hassle and most of the time, it stays out of my way.

why does the button "remember password" have no effect?

After all these years LastPass for Firefox Mobile is still completely unreliable and utterly crap. Sometimes it works, probably by accident or the position of the moon (who knows, certainly not the LastPass devs), most the time it doesn't. Not worth paying for anymore, unless you like getting frustrated.