Broken, Useless for me. Installed in Firefox running on Linux. Red dot on icon, click to log in. Succeed, but red dot is still on icon. Click icon hoping to be able to save a note... interface blinks, "we use cookies" briefly appears, nothing else happens. EDIT - found the problem seems to be a conflict with the extension "First Party Isolation." But other add-ons don't seem to be troubled by it. When I disabled First Party Isolation, I could then log in and the extension worked.