Examine source code of Vocab

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "version": "1.0.4",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "author": "Lu",
  "icons": {
    "16": "assets/icons/icon-16.png",
    "48": "assets/icons/icon-48.png",
    "128": "assets/icons/icon-128.png"
  },
  "background": {
    "persistent": true,
    "page": "background/background.html"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "contextMenus"
  ],
  "omnibox": {
    "keyword": "vb"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "common/constants.js",
        "common/utils.js",
        "content/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "content/translate-modal.html",
    "content/translate-modal.css",
    "content/card-modal.html",
    "content/card-modal.css"
  ],
  "browser_action": {
    "default_title": "Vocab",
    "default_popup": "popover/popover.html"
  },
  "content_security_policy": "script-src 'self';object-src 'self';"
}