Examine source code of Sun Setting by M♥Donna

{
  "name": "Sun Setting by M♥Donna",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "Sun SettingH.jpg"
    },
    "colors": {
      "frame": "rgba(46, 36, 30, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(48, 38, 31, 0)",
      "bookmark_text": "rgba(255, 244, 212, 1)",
      "toolbar_field": "rgba(46, 36, 29, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 244, 212, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{582d8ae9-2e33-4620-810e-3cb574dd9d17}"
    }
  }
}