I just discovered that before I had uBlock Origin, I, apparently, was adding ad website domains to my /etc/hosts by hand :D (And forgot about it, just remember

I just discovered that before I had uBlock Origin, I, apparently, was adding ad website domains to my /etc/hosts by hand :D (And forgot about it, just remembered that I copied my old disk to the one I have now in my laptop, but forgot to add it to fstab). Not a robust solution by any means, but very easy to implement.