3rd party ads are bad for privacy. But browser extensions are even worse. They can see everything you do on any website. They can change what you see. Redirect you. Send data wherever they want. Without you noticing any of this.
Besides, using this thing result in sending even more data to the advertisers.
I can understand the hate about how user hostile the web is. But this is not a solution. A solution would be to use bloated websites less.
On HN, we could downrank pages that send data to 3rd parties like this: Tell the submitter of a page "The page loads sends data to 75 different servers. Please be aware that we will not show it on the front page until it has at least 75 upvotes".
This would make an impact.
Imagine Reddit or Twitter follwing this practice. The web would become better fast.