Adblock Plus , the world's most popular ad-blocking tool, today announced it has passed 500 million downloads.<br />The half-a-billion milestone was achieved after 10 years: It just so happens that this is the same week that Wladimir Palant wrote Adblock Plus 0.6 for Mozilla Firefox back in 2006.<br />It’s important to emphasize that the company is highlighting downloads, not active users.<br />Adblock Plus didn’t share an update on the number of active users it has.<br />According to the most-recently shared numbers, Adblock Plus has over 50 million active users while AdBlock, another popular ad-blocking solution, has over 40 million active users.<br />Both tools are available across multiple platforms, so keep in mind that these numbers span various types of devices.