Examine source code of Summer Bounty

{
  "name": "Summer Bounty",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SummerBountyHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(37, 51, 14, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(37, 51, 14, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(37, 51, 14, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7706c80e-6217-407c-839d-5aa6c6422c2a}"
    }
  }
}