August 3, 2018: I have used the LastPass extension for years as a plug-in to Firefox without any difficulty. However, the latest version of the LastPass plug-in fails to integrate with Firefox 61. The only way to use LastPass from Firefox is to go to lastpass.com and login there. I logged the problem on the LastPass website last week. Not clear to me whether this is caused by a change in Firefox or in LastPass, but regardless, it renders this plug-in useless.