Examine source code of CookieScope

{
  "manifest_version": 2,
  "name": "CookieScope",
  "version": "1.0",
  "description": "Displays cookies for open tabs in a sidebar",
  "permissions": [
    "tabs",
    "cookies",
    "<all_urls>",
    "downloads",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "sidebar_action": {
    "default_title": "CookieScope",
    "default_panel": "sidebar.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f9de0217-9367-435f-9acc-b0d04578c359}"
    }
  }
}