Examine source code of FFDiff

{
  "manifest_version": 2,
  "name": "FFDiff",
  "version": "0.2resigned1",
  "description": "Pretty-print Git patch/diff files.",
  "icons": {
    "256": "icons/git-256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*.patch"
      ],
      "js": [
        "lib/diff2html.js",
        "ffdiff.js"
      ],
      "css": [
        "lib/diff2html.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c194b23c-360a-4986-b360-79ad215df1fb}"
    }
  }
}