I had the old standalone version which worked Great until they stopped supporting it this fall and I was forced to get the subscription version. Now it takes almost a full minute for the extension to even offer me the option to enter my master password. It also has to reload the extension about every 8th opening so I concur with others who've said it does not work well with Firefox. I can only hope the developers are working to improve it with this browser. Once activated it is still a good password manager tool.