Some sites try to hide their advertising partners behind direct IPs (example: http://193.192.41.2/la-1234.js instead of http://layer-ads.de/la-1234.js).
Would it be technically possible, that Firefox/Adblock Plus would try to resolve IPs and after that the address could be checked using the filter.
resolve IPs
That's probably less about hiding but more about avoiding being blocked via hosts file.
No, I don't think something can be done besides of adding a filter for this IP. Often the IP addresses don't even resolve back into names, and if they do these names are usually meaningless.
No, I don't think something can be done besides of adding a filter for this IP. Often the IP addresses don't even resolve back into names, and if they do these names are usually meaningless.