I see that now on the DuckDuckGo search results page. They are entitled to promote their products/services on their own search results page, but that is pretty obnoxious. I say just X it off, unless you are looking for additional privacy features that aren't included in Firefox already. Then you could consider it. ''The reason content blockers generally need to see everything is that they try to stop things from loading in the first place, not just removing things from pages after they are loaded. But you are right to ask the question whether you trust that the add-on author won't abuse those powers.'' See: [[Tips for assessing the safety of an extension]].