anchor.diff:          "app.normandy.api_url" = "";
           "extensions.shield-recipe-client.enabled" = false;
           "app.shield.optoutstudies.enabled" = false;
  +        "reader.parse-on-load.enabled" = false;  # "reader view"
           # Disable battery API
           # https://developer.mozilla.org/en-US/docs/Web/API/BatteryManager
           # https://bugzilla.mozilla.org/show_bug.cgi?id=1313580
  
positive.code:       env.XDG_DESKTOP_DIR = "$HOME/";
  
        modules.desktop.browsers.firefox.settings = {
          "devtools.theme" = "dark";
          # Enable userContent.css and userChrome.css for our theme modules
          "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
          # Stop creating ~/Downloads!
          "browser.download.dir" = "${config.user.home}/downloads";
          # Don't use the built-in password manager; a nixos user is more likely
          # using an external one (you are using one, right?).
          "signon.rememberSignons" = false;
          # Do not check if Firefox is the default browser
  
negative.code:         "browser.newtab.preload" = false;
          "browser.newtabpage.directory.ping" = "";
          "browser.newtabpage.directory.source" = "data:text/plain,{}";
          # Reduce search engine noise in the urlbar's completion window. The
          # shortcuts and suggestions will still work, but Firefox won't clutter
          # its UI with reminders that they exist.
          "browser.urlbar.suggest.searches" = false;
          "browser.urlbar.shortcuts.bookmarks" = false;
          "browser.urlbar.shortcuts.history" = false;
          "browser.urlbar.shortcuts.tabs" = false;
          "browser.urlbar.showSearchSuggestionsFirst" = false;
          # Disable some not so useful functionality.
          "media.videocontrols.picture-in-picture.video-toggle.enabled" = false;
          "extensions.htmlaboutaddons.recommendations.enabled" = false;
  