Examine source code of FakeMSM

{
  "manifest_version": 2,
  "name": "FakeMSM",
  "version": "1.1resigned1",
  "description": "Replaces MSM with Men who have Sex with Men on Twitter feeds.",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "replacer.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee25b125-994c-41b4-9145-fa5fe1360078}"
    }
  }
}