Persistent notification is the only thing which is annoying sometimes, especially cause it cannot be dismissed with the close button; it just comes back again and again!
Everything else, the functionality, accuracy and all is perfect. It does what it offers. :)

Works well in terms of basic website location (unless protected by Cloudflare) but I can only hide the flag context menu with a custom userchrome fix, there is no other way. I'm surprised the developer has stubbornly chosen not to add this.