Examine source code of Tana PGP

{
  "manifest_version": 2,
  "name": "Tana PGP",
  "description": "Verifies PGP signed pages for extra security against malicious or breached servers.",
  "version": "1.0",
  "homepage_url": "https://github.com/tasn/webext-signed-pages",
  "options_ui": {
    "page": "options/options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/crypto.js",
        "js/js-encrypt.js",
        "js/jquery.min.js",
        "auto.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_icon": "icons/32.png",
    "default_title": "Beastify",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "web_accessible_resources": [
    "js/*.js"
  ],
  "permissions": [
    "storage",
    "activeTab",
    "webNavigation",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff72a436-b392-4575-9589-f9780dbad673}"
    }
  }
}