Uninstalling and then reinstalling gave me the same thing. "
I've tried downloading it through Firefox's add-ons website and the developers website. Though when I tried the developers website here: http://adblockplus.org/en/installation and clicking on "Install Adblock Plus 1.3.1" the page is 404'ed.
So I'm assuming it has something to do with the developer and not my Firefox?
I have tried uninstalling Firefox and reinstalling but every time I try to download adblock plus I get this message
'the add-on could not be download because of a connection failure on addons.mozilla.org.@ but I cant find anyway to address this problem, if anyone can help it may stop me smashing my screen when on ebay - because of the continuous flashing ads for gambling etc.