Examine source code of JA-37 Viggen

{
  "name": "Untitled",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled.jpeg"
    },
    "colors": {
      "frame": "rgba(90, 150, 200, 1)",
      "tab_background_text": "rgba(61, 61, 61, 1)",
      "toolbar": "rgba(0, 0, 0, 0.16)",
      "toolbar_field_text": "rgba(61, 61, 61, 1)",
      "tab_line": "rgba(122, 220, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{91cf74f3-e3a1-42f4-a203-979e72e1d0f0}"
    }
  }
}