That's not the point, I already have another browser which is set as the default one. The problem is the vanilla browser opens by itself when interacting with some links in other apps (it simply ignores apps settings), which leads to the default page being opened (and which can't be even changed, despite telling settings to do otherwise) instead of whatever was the original destination. It would be easy to fix that by disabling Browser altogether, but for some reason the OS won't allow that with the only option being root access for killing that crap entirely.
As for Adaway, that's a global ad blocker, meaning it blocks every single ad, and not something that works only while browsing web pages. It only works when root access is allowed.
Why won't the admins address this issue? This silence doesn't exactly play on their behalf.