Examine source code of Bird & Rose by M♥Donna

{
  "name": "Bird & Rose by M♥Donna",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(17, 18, 20, 1)",
      "tab_background_text": "rgba(250, 228, 120, 1)",
      "toolbar": "rgba(17, 18, 20, 0)",
      "bookmark_text": "rgba(255, 221, 110, 1)",
      "toolbar_field": "rgba(17, 18, 20, 0.1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(247, 247, 247, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{524ea4f4-e953-4a5d-8c84-e6add8554940}"
    }
  }
}