Marginally functional. The extension is slow, freezes, and often crashes during regular use. I cannot recommend this to new users or anyone not already under LastPass' command.

Melhor aplicativo de gerenciamento de senhas, eu utilizo ele a anos, em todos os meus dispositivos, e desde então, nunca tive que me preocupar em ter a minha conta roubada por conta de senhas fracas, com a pontuação das senhas do LastPass eu consigo ver quais das minhas senhas já foram usadas mais de uma vez e a força de cada senha

Coming from other browsers - LastPass just worked. However, i'm trying to make the jump from Chrome to Firefox (As many are, with Google continually taking the "Don't" part out of its motto) but this constantly broken functionality is a mess. Blank or no popups, trouble detecting if there are fields to fill in, no version options visible. At this point I'm keeping a separate browser up just to get to my passwords.

Issues:
1. NEVER accepts login from toolbar or variations such as accepting to enter email but refusing to take passwd.
2. Inconsistency in saving auto-generated passwds. You generate a passwd and can't login since it's not been saved.
3. Maybe related to no.2 ...once in a while an entry is created but multiple times. Occurs even when editing sites and notes.

Ubuntu 18.04.1

##Update 26/01/2019
Have been using the signing function for ~ 2 weeks now. Wohoo!!!! Now for those duplicates to be resolved and for lastpass to remember a password when I am signing up more consistently.

Ubuntu 18.04.1
Version 64 Mozilla Firefox for Canonical - 1.0

whenever i use lastpass password generation tool to change my passwords, it doesn't ask for password update, i got locked out of a website's account because of this, it helps you generate a password that you can't remember and then doesn't save it for you, this sucks

Lastpass has saved me from password resets multiple times per day for the past several years. I rely on this add-on and the chrome add-on for carrying out daily business, safely sharing sensitive passwords with people, and more. This add-on is great and I almost never have problems with it.

This extension works well, after you login either through lastpass.com or its moz-extension page, but never through the toolbar shortcut. It's a small annoyance that I'd loved to be fixed, LogMeIn.

Ubuntu 18.04.1 LTS
Firefox 64.0

Muy útil y el precio me parece muy accesible.