Examine source code of No More New Tab

{
  "name": "No More New Tab",
  "version": "1.0.5resigned1",
  "description": "リンクをクリックしても新規ウィンドウを開かないようにします。",
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self'",
  "background": {},
  "icons": {
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://*/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.jp/*"
      ],
      "css": [],
      "js": [
        "lib/jquery-3.0.0.min.js",
        "amazon.user.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "homepage_url": "http://booksbar.jp/",
  "permissions": [
    "*://*/*",
    "*://*.amazon.co.jp/*",
    "*://*.amazon.jp/*",
    "storage",
    "unlimitedStorage"
  ],
  "web_accessible_resources": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{00448084-a4e5-4e51-a032-8c865c240022}"
    }
  }
}