Examine source code of Walking the Dogs

{
  "name": "Walking the Dogs",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "walkingthedogsH.jpg"
    },
    "colors": {
      "frame": "rgba(240, 201, 72, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(242, 208, 72, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(242, 208, 72, 0.07)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{992b98fe-c327-4c60-993f-06c61d8cf296}"
    }
  }
}