I don't know, I've been having the same problem.
You can change the types of ads you get by muting the ODing ads and changing the prefrences on your google account.
I get AdBlocker. It is a very popular app on the Chrome and Firefox store, and for free! It does not block ROBLOX ads unless if you want it to. You can also get CatBlocker, to replace all ads with cats. :3