Comment Comment by Jamieee From the tweet's Author it's disabled via:about:configbrowser.newtabpage.activity-stream.showSponsoredbrowser.newtabpage.activity-stream.showSponsoredTopSitesthere is also:services.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsoredservices.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsoredTopSites parent Jamieee 5 years ago
about:config
browser.newtabpage.activity-stream.showSponsored
browser.newtabpage.activity-stream.showSponsoredTopSites
there is also:
services.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsored
services.sync.prefs.sync.browser.newtabpage.activity-stream.showSponsoredTopSites