Dolphin with the Adblock addon.
There's an adblock option for Dolphin.....?
The 11.3.4 version has a working flash option for lollipop, so that is good
Ad blockers are not allowed on the Play store so you'll need to grab the APK from Dolphin's site (which also offers the modified Flash): http://dolphin.com/lab/en
Chrome.
Chrome lacks gestures, which I use all the time to quickly scroll to the top and bottom of web pages.
Normally Boat Browser for the instant gestures, Dolphin if I need Flash.