Examine source code of FYTS

{
  "manifest_version": 2,
  "name": "FYTS",
  "version": "1.0",
  "description": "Turns Youtube Shorts links into regular links with a press of a button.",
  "icons": {
    "48": "icons/fyts.png"
  },
  "browser_action": {
    "default_icon": "icons/fyts.png",
    "default_title": "FYTS"
  },
  "permissions": [
    "*://*.youtube.com/*",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/shorts/*"
      ],
      "js": [
        "fyts.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "fyts.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a4ac656e-f3c5-4826-9993-986769f33741}"
    }
  }
}