This app was mentioned in 5 comments, with an average of 1.60 upvotes
https://play.google.com/store/apps/details?id=acr.browser.butterfly&hl=en Butterfly Browser. - uses less memory - has adblock - can import html bookmark files
Lightning Browser, it has ads Lucid Browser, even though it has "adblock" it doesn't block all ads.
Try this. Was designed by a redditor, I believe.
As of yesterday, he states it was removed from the app store, but that he'll try to get it on the site asap.
I've used it, and it really does block a ton of ads. Coupled with Butterfly Browser, it seems to work great.