anchor.diff:          # https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-source
           # https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-ping
           "browser.newtabpage.enhanced" = false;
  +        "browser.newtabpage.introShown" = true;
           "browser.newtab.preload" = false;
           "browser.newtabpage.directory.ping" = "";
           "browser.newtabpage.directory.source" = "data:text/plain,{}";
  
positive.code:       modules.desktop.browsers.firefox.settings = {
          # Default to dark theme in DevTools panel
          "devtools.theme" = "dark";
          # Your customized toolbar settings are stored in
          # 'browser.uiCustomization.state'. This tells firefox to sync it between
          # machines. WARNING: This may not work across OSes. Since I use NixOS on
  
negative.code:         # Disable Activity Stream
          # https://wiki.mozilla.org/Firefox/Activity_Stream
          "browser.newtabpage.activity-stream.enabled" = false;
          "browser.newtabpage.activity-stream.telemetry" = false;
          # Disable new tab tile ads & preload
          # http://www.thewindowsclub.com/disable-remove-ad-tiles-from-firefox
          # http://forums.mozillazine.org/viewtopic.php?p=13876331#p13876331
  