Examine source code of Barn Swallows

{
  "name": "Barn Swallows",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "BarnSwallowsH.jpg"
    },
    "colors": {
      "frame": "rgba(171, 168, 106, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(171, 169, 105, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(171, 169, 105, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3cf71c9-fb0c-491d-bb94-fd4dcf135eaa}"
    }
  }
}