Rated 5 out of 5 stars
Definitely a must-have for anyone wishing to establish "bridges" with other similar sires, to discover articles referring to, with was is twittered about a given site.
One suggestion, far from semantics, concerning the width of the sidebar, which when changed is not remembered when session closed, though it is possible to fix it session-wide with the about:config parameter "extensions.similarweb.sideBarWidth" : set it to your likes (number understands pixels). Here 230 on a 1280 screen width is that I use for other sidebars and preserves most sites' integrity).
Globally, the true conclusion: I'm keeping this extension.