I'm a big fan of Self-Destructing Cookies (on the desktop and on mobile).

Good lord, yes. Have you ever browsed the web on mobile without AdBlock? It's nearly useless. Setting aside the bandwidth you're wasting, nearly every page redirects you to the app store or pops up a dozen shitty ads before you can see the content.

I'm still baffled that ad networks allow advertisers to inject arbitrary javascript into their banner ads. Why on earth are they allowed to deliver anything other than an image?

Anyways, I'll never browse the web without AdBlock again and I'm astounded that so many people are able to do so.

With the current privacy hostile browser defaults, it's pretty much a must if you care about that department at all.

(Of course it may be that nobody privacy conscious uses Android/iOS at all...)

Firefox for Android does have adblock. Almost all of my desktop addons are available on mobile Firefox.