Adblock Plus, the world’s most popular ad-blocking tool, today announced it has passed 500 million downloads. 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.

It’s important to emphasize that the company is highlighting downloads, not active users. Adblock Plus didn’t share an update on the number of active users it has.

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. Both tools are available across multiple platforms, so keep in mind that these numbers span various types of devices.

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