It didn't work for me. That's a problem, but that's not the important thing. Apparently, it's going to collect your browser activity now. So it's time to remove it. I think someone bought this extension.

Works as expected.
The permissions required are suspect, but with auto-update disabled for this plugin and after reading the XPI source code, I'm fine with it.
The source code is clean and icons are nice and simple.
Good job!

Does exactly what it says, zero config, easy to audit.