CraigMatze You might want to look into either uBlock Origins (note the Origins, it's important), Privacy badger, AdGuard or, if you're so inclined uBlock Matrix. AdBlock and AdBlock Plus haven't had the cleanest of records, nor the best performance when it comes to their tasks. And then there's the whole Acceptable Ads debacle that started a few years ago. If you're OK with allowing certain ads I'd rather suggest you moved to either FF with Privacy Badger or Brave since Brave doesn't stop first party ads and has both HTTPS everywhere and Privacy badger inbuilt. Otherwise, just move from AdBlock to either AdGuard, uBlock Origin, or, again if you're willing to tolerate some ads Privacy badger.
I get it, AdBlock Plus and AdBlock are the oldest extensions of their kind, but it's been a very long time since they were the best. And now? now they're in bed with advertisers. And this coming from someone that uses Brave whilst fully aware Brave wants to reach the same spot AdBlock and AdBlock Plus are currently in.