Theme with wallpaper Category

wallpaper

    {
      id: "AW_CHOOSE_THEME",
      targeting: "localeLanguageCode == 'en'",
      content: {
        position: "split",
        split_narrow_bkg_position: "-58px",
        background:
          "url('chrome://activity-stream/content/data/content/assets/mr-amo-collection.svg') var(--mr-secondary-position) no-repeat var(--mr-screen-background-color)",
        progress_bar: true,
        logo: {},
        title: {
          string_id: "mr1-onboarding-theme-header",
        },
        subtitle: {
          string_id: "mr1-onboarding-theme-subtitle",
        },
        tiles: {
          type: "theme",
          category: {
            type: "wallpaper",
            action: {
              type: "SET_PREF",
              data: {
                pref: {
                  name: "browser.firefox-view.feature-tour",
                },
              },
            },
          },
          action: {
            theme: "<event>",
          },
          data: [
            {
              theme: "automatic",
              label: "A1",
            },
            {
              theme: "light",
              label: "A2",
            },
            {
              theme: "dark",
              label: "A3",
            },
            {
              theme: "alpenglow",
              label: "A4",
            },
          ],
        },
        primary_button: {
          label: {
            marginBlock: "4px 0",
            raw: "Save theme",
          },
          action: {
            navigate: true,
          },
        },
        additional_button: {
          label: "Explore more themes",
          style: "link",
          flow: "column",
          action: {
            type: "OPEN_URL",
            data: {
              args: "https://addons.mozilla.org/firefox/themes/",
              where: "tab",
            },
            navigate: true,
          },
        },
        secondary_button: {
          label: {
            string_id: "mr1-onboarding-theme-secondary-button-label",
          },
          action: {
            theme: "automatic",
            navigate: true,
          },
          has_arrow_icon: true,
        },
      },
    },