Works well for the most part but…
Response from developer
If the extension isn't running on x.com, you will need to grant the it permissions for x.com by either clicking the extension's icon in the browser, or via Safari → Settings → Extensions. There is also an active Twitter bug we're looking at where viewing a user profile causes its page title to become "sticky", which breaks Control Panel for Twitter's page change detection.
Works again!
Hasn’t worked in weeks
Great extension
Great extension
Worth it
Great Concept, No Execution
Response from developer
If the extension isn't running at all, you need to grant the it permissions to run on Twitter via Safari → Settings → Extensions. Unfortunately, Safari extensions are disabled by default and need to explicitly have permissions granted to enable them. We have an FAQ about how to do this on our website.