It used to be quite good, but now it either fails to log me in or runs incredibly slowly. I don't think this is down to their website, as the Chrome version of the extension on Vivaldi seems too work far better and quicker; ergo the FF add-on may not be up to the job. I have reinstalled the FF version, which seems to make a slight difference, but I expect these problems will recur.

I pay for Lastpass, and I'm afraid that as its annual cost has risen, its performance and overall security have fallen. There are other PMs that are better.