Examine source code of Fallout Vault-Tec

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Fallout Vault-Tec",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(52, 89, 133)",
      "toolbar_text": "rgb(253, 240, 112)",
      "frame": "rgb(52, 89, 133)",
      "tab_background_text": "rgb(131, 168, 212)",
      "toolbar_field": "rgb(26, 26, 26)",
      "toolbar_field_text": "rgb(253, 240, 112)",
      "tab_line": "rgb(253, 240, 112)",
      "popup": "rgb(52, 89, 133)",
      "popup_text": "rgb(253, 240, 112)",
      "tab_loading": "rgb(253, 240, 112)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d87b6bd-307f-4f10-b564-ea0707d1b411}"
    }
  }
}