It seems that mediafire.com started to put a redirect ploy when you click on the download button.
What they did put a hidden/invisible clickable front drop that when you click on anything, it will redirect to another site with ads and junk.
Here is how to block this:
||mediafire.com/templates/linkto/ads.php?*
Not sure if this is something you can add to Easy List, but if not, please share this tip to the signature that supports these types of block, thanks in advance.
Please note I am not an advanced user, so if you see a way to improve my filters, please feel free to share it. Thanks.