Examine source code of RB DoubleClick

{
  "manifest_version": 2,
  "name": "RB DoubleClick",
  "description": "Makes it possible to double-click a line in Review Board to comment. Only works on reviewboard.mozilla.org for now.",
  "version": "0.0.3resigned1",
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "*://reviewboard.mozilla.org/*"
      ],
      "run_at": "document_end"
    }
  ],
  "applications": {
    "gecko": {
      "id": "rb-doubleclick@mikeconley.ca"
    }
  }
}