Simple, but effective. The other plugin requires direct install on the dev version of firefox, and though that one has more features, like sending cookies to hydrus, it is a resource hog. This one works fine and though I would like the cookie feature this ext has 80% of what I want without crazy performance requirements.

I have done all steps and it still not connecting.
Update: you need to refresh your page to see the status change to connected.

Works great, but "Keyboard shortcut for sending current tab" what is it?

Works like clockwork, there is also an indicator that the url has already been added. But I would like to be able to disable notifications. Thanks for extension!