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Home security Google removes two ad blockers that collect user data

Google removes two ad blockers that collect user data

Google removed two ad blocker extensions from the official Chrome Web Store over the weekend after realizing they were stealing users' data.


The two extensions are called Nano Adblocker and Nano Defender, and each had more than 50.000 and 200.000 installations, respectively, by the time they were removed.

Both have been around for over a year, but malicious code was not included in the original publications.

The data collection code was added to authorities this month, in October 2020, after the original creator sold the two extensions to “a team Turkish developers ”.

After the sale, several users, including Raymond Hill, creator of the ad blocker uBlock Origin, appeared to point out that the two extensions were modified to include malicious code.

“The extension is designed to seek [sic] specific information from your outgoing requests in network and send them to ", said Hill.

After further analysis, this malicious code was exposed for collection information about users, such as:

  • User IP address
  • Country
  • Details operating system
  • URLs
  • Timestamps for web requests
  • Methods HTTP (POST, GET, HEAD, etc.)
  • Size of HTTP responses
  • HTTP status codes
  • Time dedicated to each website
  • Click on other URLs on a web page

In addition, the two Turkish developers never modified the author fields of the two extensions, leaving the original author's name in place, in what appears to have been an attempt concealment of selling and the culprit behind the malicious code.

The two Turkish developers created a page with the privacy policies where they tried to reveal the collection behavior data in an erroneous attempt to legitimize malicious code.

However, this made things easier for Google staff, as any extensive data collection is prohibited under Chrome Web Store rules.

Both extensions were removed over the weekend and turned off in users' Chrome browsers.

The versions in Firefox of Nano Adblocker and Nano Defender never contained the malicious code, as they are not part of selling and is managed by another developer.


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Teo Ehc
Teo Ehc
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