Examine source code of YouTube Short Blocker

{
  "manifest_version": 2,
  "name": "YouTube Shorts Blocker",
  "version": "1.0",
  "description": "Removes all YouTube Short videos.",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "*://*.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2a86fa8f-b135-43d8-b040-aa3184897d50}"
    }
  }
}