Extensions work only on tabs that display websites. Extensions can not work on the browser default startup page, settings page, PDF viewer etc.

If your extension doesn't function properly try the following:
1) Reload the tabs.
2) Reload the browser.
3) Check you didn't disable it manuely.
4) Review the settings page.
5) Make sure your browser and the extension are updated to the latest versions.
6) Turn the extension off and then on in the browser extension manager.
7) Contact us.

If the ring appears but does not show any icons try clauses 2 or 6 first.