Examine source code of Sigmapedia

{
  "manifest_version": 2,
  "name": "Sigmapedia",
  "description": "Wikipedia for those with a severe attention deficit",
  "version": "1.0",
  "icons": {
    "48": "icons/48.png",
    "64": "icons/64.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sigmapedia@JustTemmie.non-existant-email"
    }
  },
  "permissions": [
    "webRequest",
    "storage",
    "unlimitedStorage",
    "<all_urls>"
  ]
}