I'm having a problem installing the Dashlane extension. I have gone to download it several times and the icon just says "installing." I see that the extension downloads, but gets stuck when it comes to "verifying" the download. I used Dashlane plugin on Chrome for months and it has become integral to my web activity. I am trying to make the switch to Firefox, but this is a huge hold up. I've checked that my firefox version is up to date and it is. Help!