Examine source code of YouTube Video Filter

{
  "manifest_version": 3,
  "name": "YouTube Recommendation Filter",
  "version": "4.1",
  "description": "Filter YouTube recommendations by video age, views, length etc.",
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "content/globals.js",
        "content/storage.js",
        "content/utils.js",
        "content/ui.js",
        "content/filters.js",
        "content/mutations.js",
        "content/main.js"
      ],
      "css": [
        "content_style.css"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a64b02c2-169e-438b-bcd2-6f3a0897c0e8}"
    }
  }
}