Examine source code of viewport

{
  "name": "__MSG_extName__",
  "description": "__MSG_extDesc__",
  "version": "1.1.4resigned1",
  "short": "__MSG_extName__",
  "manifest_version": 2,
  "default_locale": "en",
  "author": "viewportgroup@outlook.com",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "scripts/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "permissions": [
    "contextMenus",
    "tabs",
    "storage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "icons": {
    "16": "images/icon-48.png",
    "48": "images/icon-48.png",
    "128": "images/icon-48.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "images/icon-48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3e3a2595-dd45-4ef2-9804-d8dfd87311a1}"
    }
  }
}