Great when it works. Unfortunately there is a long-ongoing issue with the add-in not logging itself in. Close the browser and re-open it, and LastPass often stays logged out, requiring you to open the add-in and log into it before it starts recognizing sites. LastPass Support says they are aware and working on it, but it's been like this for months.

I'm on Pop!OS linux. All updates applied. I install last pass from the official Mozilla site. I can not sign in. Windows for sign in vanishes after inputting my email address. No chance to put in password.

Discovered my problem, all is well. Excellent app.

I use LastPass on both Linux Mint and Ubuntu systems and with Firefox and it functions very well, however in Firefox on Ubuntu 18.04.1 I am forced to open LastPass and re-login every time I open the browser. Other installs do not behave this way. A real pain. I think this is a good app, wish could give it 5 stars.

Ever since Firefox updated it says all my addons are legacy and so I have to get LastPass (among others) all over again. But when I try to add LastPass to firefox .. it says Download failed. Please check your connection. Obviously I am on the net if I can post this .. It is not LastPass' fault necessarily but Firefox as now all addon creators have to go through a process of getting their addons verified so that Firefox is allowed to let them connect. It is some sort of protection with the latest update. This is the information important for LastPass' developer:

The following add-ons have not been verified for use in Firefox. You can find replacements or ask the developer to get them verified. Dev's can read out manual here: https://wiki.mozilla.org/Add-ons/Extension_Signing

有不少网站登陆的时候会报错。密码验证虽然能过，但是会导致跳出的随机验证出错，从而导致登陆失败。

The best extension you can ever have on every web browser. I have used the other competing password managers out there in the past but none of them can compare to LastPass. I seriously cannot live without LastPass. It makes my life so much easier not having to remember 1000 different passwords. Thank you LastPass for such an amazing experience.

Edit: There seems to be some sort of bug in this Add-on, where it logs me off automatically. It is very inconvenient to have to log in every time I start up Firefox. It gets fairly annoying as some have mentioned.

LastPass 4.19.0.5
MacBook Pro (15-inch, Mid 2012)
macOS version 10.14.2 Beta (18C48a)
FF: 63.0.3 (64-bit)

once the add-on run perfectly well on Firefox for Android, and all of a sudden after a version update, logging in takes forever. I tried to reinstall the add-on, and after i uninstalled the add-on, I found that the add-on is no longer available on Android.

I've been using Last Pass for more than 10 years now.... and since they added their family plan, my hesitant husband has joined the crew! this saves us from the MANY times we've texted each other in order to get the latest password for our banking or other online logins!

Why does it show register dialog instead login dialog everyday? Frustrating and uncomfortable. <--2018, 2019 still the same! Nobody will register every day, if I open the plugin I just want to login. Why shouldt I doeveryday this one extra click? (Wouldt be 4 starts instead)

Too many bugs Why always close the mini tab automatically? Why can't we find the copy button?

I like LastPass the service, but the Firefox Add-on doesn't work well. There is no option to copy username or password from the menu. Must 'Edit' the site in a new tab and show password to copy it. I think there are other options specifically on Firefox that don't show up in Chrome or Edge.