very useful, easy to use.

doesn't work
tested on firefox developer v.73

screenshot
https://i.imgur.com/1vzRyKh.png

276351404@qq.com

Once upon a time, in a different galaxy, this addon was of real use. Its original function – that of indicating similar sites – has already been buried in the ninth tab of an otherwise useless interface for ages. Now, for some mysterious reason I'm not inclined to elucidate, even that bit of functionality is gone, and only the first three tabs are operable. Which leaves me with no reason to keep this addon in my browser any more.

Excellent extension, shows the main indicators of the site, I think seo specialists it will be useful