Examine source code of cookiecopy

{
  "browser_specific_settings": {
    "gecko": {
      "id": "cookiecopy@cookiecopy.com"
    }
  },
  "manifest_version": 2,
  "name": "cookiecopy",
  "version": "1.0",
  "description": "Copy cookies for the active tab.",
  "icons": {
    "48": "icons/cookie.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_title": "CopyCookie",
    "default_popup": "copycookie.html",
    "default_icon": {
      "48": "icons/cookie.png"
    }
  },
  "permissions": [
    "cookies",
    "<all_urls>",
    "tabs",
    "clipboardWrite"
  ]
}