Examine source code of Birds on Branches

{
  "name": "Birds on Branches",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "BirdsonLimbsH.jpg"
    },
    "colors": {
      "frame": "rgba(233, 229, 204, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(235, 232, 206, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(235, 232, 206, 0.06)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(250, 90, 50, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b400a222-888b-4358-ba26-6197a87cd112}"
    }
  }
}