Examine source code of wfm

{
  "manifest_version": 2,
  "name": "wfm",
  "version": "1.2",
  "description": "Reformats the profile page of wfm.",
  "content_scripts": [
    {
      "matches": [
        "*://writeforme.org/user.php*"
      ],
      "js": [
        "wfm.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "chastity.virgin.wfm@google.com"
    }
  }
}