Examine source code of Bubblegum

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Bubblegum",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(255, 192, 216)",
      "toolbar_text": "rgb(248, 112, 140)",
      "frame": "rgb(255, 100, 140)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(123, 127, 204)",
      "tab_line": "rgb(255, 0, 4)",
      "popup": "rgb(255, 154, 156)",
      "popup_text": "rgb(98, 102, 183)",
      "tab_loading": "rgb(255, 0, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{40db0982-02d4-4c4b-aae4-3fff65ce0b85}"
    }
  }
}