Adblock, a popular extension for blocking advertising in Chrome and Safari with more than 40 million users, was quietly sold today. The extension displayed a popup on October 1 saying that it is now allowing Eye's 0acceptable advertising - which allows advertisers to buy their way onto the whitelist - through the filter. hat's strange is that the company won't disclose who it's been sold to, why it was sold, or how much it was sold for. For the extension's claimed 40 million users this raises an interesting question: Can the extension continue to be trusted if the new proprietor is entirely anonymous? TNW contacted Adblock's remaining staff to ask if they'd disclose the buyer but the company refused, saying that the purchaser had specifically asked not to be named. The only thing the team would tell us is that the tool's creator Michael Gundlach will no longer have any relationship with the company — that probably means he's cashed out. Adblock's previous director, Gabriel Cubbage, is now running things under the new owner.