Google Analytics Opt-out Browser Add-on

When I installed this it said it "can read sensitive information from webpages, including passwords, phone numbers and credit cards on ALL WEBPAGES" and that it "can see when you visit ALL WEBPAGES" so I deleted it. It seems to be exactly the opposite of what I want from google. It's bad enough that Safari uses "gooleads" every time I search using google. If I use a VPN, Safari won't load the search results because googleads can't run. Truly this all sounds like a scam and I don't know why Safari uses googleads much lee allow this Google Analytics Opt-out Browser Add-on to run on Macs!

Why exactly should I use this add-on? I think I'd be safer using Duck Duck Go or the Brave browser and its search engione. What does Google Analytics Opt-out Browser Add-on actually do?