Examine source code of Grant Clipboard

{
  "manifest_version": 2,
  "name": "Grant Clipboard",
  "description": "Let specific sites paste from your clipboard without a prompt",
  "version": "0.0.1",
  "permissions": [
    "<all_urls>",
    "clipboardRead",
    "storage"
  ],
  "icons": {
    "128": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{afb00883-4228-432f-882a-4d1023cc87eb}"
    }
  }
}