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 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!

Unfortunately it does not seem to connect despite entering a key with the right permissions