Nerf substitutions

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Nerf substitutions",
  "description": "Make reading the news more fun.",
  "version": "1.0.5",
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "js": [
        "js/jquery.min.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "128": "images/icon128.jpg"
  }
}