Firefox 54, Webclipper 6.12.1.1, macOS Sierra 10.12.5

Still only working, wenn logged in to the Evernote web account and having set the cookie by checking the checkbox "Remind me for 30 days" at the web login pane.

Amazingly even having the Evernote client running, doesn't change that behavior! This is weird: the client is logged in, but Web Clipper doesn't do anything (red dot).

If the cookie isn't set (means, you did not log in to your Evernote web account and set the remind option at the login mask) you will see that red dot on the Evernote icon in the Firefox toolbar.

I'm still asking myself, why clicking on the Evernote icon with the red dot, does not at least open a dialogue on the Evernote website, in order to provide a login interface?

This may one reason why so many people say "it doesn't work".