Ok so this may irritate a majority of members of a higher up status but... This ad blocker thing is a bad idea. Whilst I fully understand that this site is a non-profit and needs ad rev to stay online, but actively forcing people to disable their blockers is not the smartest of moves. A lot of people, myself included, have ad blockers installed for privacy & security reasons. Disabling the use of downloads because someone uses an ad blocker is just going to push people away from using this site. The best thing to do would be to ask people to whitelist the site or ask them to make a donation rather than force them fully disable their ad blocker in order to use the download feature. It doesn't give off the most friendly of vibes. I'd suggest taking a look at this Google article for better ways of dealing with ad blockers and why people choose to use them. Engaging with people who use ad blockers - Think with Google