Firefox 66.0.3 has a problem that unables the downloading and installation of extensions. I got around it by downloading the previous version Firefox 66.0.2. Just go to firefox page and choose your system. https://ftp.mozilla.org/pub/firefox/releases/66.0.2/

Jammer dat deze verwijderd is als extensie!!

Dommage que Firefox n'en permette plus son utilisation!!

LastPass è ottimo peccato che Firefox non si aggiorni su questo componente aggiuntivo. Se continua così disinstallerò Firefox. Programmatori di Mozilla Svegliaaaaa

The add-on is blocked, but it's a problem on Mozilla's side. The problem seems to be known and under investigation https://bugzilla.mozilla.org/show_bug.cgi?id=1548973

The add on is disabled on firefox on 2019 May 04 together with other add ins.