Examine source code of Strava Filter

{
  "description": "Filters strava cloub leaderboard",
  "manifest_version": 2,
  "name": "strava_filter",
  "version": "3.2",
  "icons": {
    "18": "icons/filter-18.png",
    "24": "icons/filter-24.png",
    "36": "icons/filter-36.png",
    "48": "icons/filter-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.strava.com/clubs/*/leaderboard?strava_filter"
      ],
      "js": [
        "strava_filter.js"
      ]
    },
    {
      "matches": [
        "*://www.strava.com/clubs/*/leaderboard?strava_screen"
      ],
      "js": [
        "strava_screen.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "applications": {
    "gecko": {
      "id": "{17c04c99-8ee2-43c0-ae4b-f049bda186c6}"
    }
  }
}