Examine source code of RedirectMWiki

{
  "manifest_version": 2,
  "name": "RedirectMWiki",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "*://*.m.wikipedia.org/*"
      ],
      "js": [
        "redirectmwiki.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{764b33a9-e7c9-4ddb-b84b-10cdd232c165}"
    }
  }
}