I think that they use their own server to store this extension -> https://www.dashlane.com/download

Very many thanks TyDraniu. That solved my problem. I did attempt to download the Dashlane direct, but, for one reason or the other it hadn't worked. No problem with your link. I'm up and running again. Thanks again. John.

But why is it not available as an extension? If this is Firefox being greedy and asking for money, do we need to be told?

I want to continue using Firefox, but I need Dashlane to appear somewhere in bar. It is installed but the icon does not appear. I'm working on a MacBook. Sadly I must use Chrome until this is fixed.

I can download, from the link givenabove, the extension from Dashlane OK, but when I attempt to install it, I get a notification stating "The add-on could not be installed because it does not match the add-on Firefox expected" Can anyone please suggest what Firefox was expecting? Has anyone else experienced this problem? Thanks.