from what i have noticed, only crappy ad block extensions don't block signatures.
a good one like ublock origin (i believe is the most popular one used by forum member) does block signatures.
How is that possible? Do they have bots that manually check Bitcointalk signature campaigns and block the signature code? Or do they block any 3rd party URL that's on the website? Does anyone know how it works?
nothing that complicated. lol
for ublock origin, it's quite simple really. the extension just looks for the div with the class "signature" and adds the following css display rule:
.signature:has(a[href]:not([href*="bitcointalk.org"])) {
display: none !important;
}