maybe add a note to remove some sites from about:config's extensions.webextensions.restrictedDomains if you're allowed to say that?

Very useful. But the extension needs a whitelist. Some websites that have Facebook comments are broken.

Could you explain, when I click a link, what is the policy about referrer URL? Can you add control into the plugin to disable sending referrer when opening a link to another domain?

Sehr nettes Addon. *daumen*

Ich wünschte wohl eine Whitelist (z.b. für die eigene Seite) :-)

Finally, tracker-free URL sharing