The Add-On doesn't work most of the time or behaves oddly. I'm used to work in two different accounts on same PC. In one of the accounts LastPass is instantly logged-in most of the time. In the other account I can't even use the add-on's popup menu from toolbar for it's empty thus showing very small "balloon", only. I have to use the website lastpass.com then to log in which is yet another pain for its series of reloading events taking some remarkable amount of time just to get the login prompt finally.

In addition, the plugin keeps interfering with input fields not related to any authentication. In several cases LastPass offers to replace accounts not related to the website I'm currently visiting. And in such cases it doesn't provide option for creating another record instead, but requires to either ignore some new credentials or update some unrelated existing ones.

You might expect such issues to be fixed as I can't be the only one in 750.000 users seeing such problems, but LastPass doesn't seem to care quite much about them. So, I'd rather spend my money to some other company or drop use of this "password un-manager" definitely resulting in a less safe internet, though. Target missed ...