Examine source code of Missing Fooda filters

{
  "manifest_version": 2,
  "name": "Missing Fooda filters",
  "short_name": "Missing Fooda filters",
  "description": "Adds min/max price filters to the Fooda browse items page",
  "author": "Alexander Kaupanin",
  "version": "0.0.2resigned1",
  "content_scripts": [
    {
      "matches": [
        "https://app.fooda.com/accounts*select_events*items"
      ],
      "js": [
        "vendor/jquery.min.js",
        "fooda_filters.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4573b665-5c4a-4620-a10b-ff850f440de5}"
    }
  }
}