Ok. Maybe I'm an idiot, i can take that. I can't get adblock to work on Diablo. It installs fine, the browser says it's enabled, but the ads remain. I'm told there should be a new red button that links to the Adblock preferences but that's not present either. Is this a known issue or am I missing something obvious?

I had that happen to me too. It eventually started to work for me after installing and uninstalling a bit. If you search around there are other threads on this issue.