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Crowdsourced list of URLs that had in-page pop-ups
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Mozilla's Crowdsourced In-Page Pop-Up URLs

For a period of about 11 months—March 2018 to January 2019—Mozilla asked volunteers to report URLs that showed in-page pop-ups. Using a custom add-on, Firefox users contributed over 12,000 of these, which we now make available to you. Thanks to all who participated! Watch this space for applications of this research.


  • The University of Toronto team who scoured the data to expunge any accidentally submitted personally identifiable information: Patrick Wu, Ashley Sheng, Kristen Malik, and Douglas McDermott.
  • Ehsan Akhgari, Erik Rose, and Mike Hoye, Mozilla staff mentors of the above
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