Examine source code of YT Bookmarks

{
  "manifest_version": 3,
  "name": "YT Bookmarks",
  "version": "1.0.0",
  "description": "Bookmark youtube gems for later with single click.",
  "permissions": [
    "storage",
    "tabs",
    "webNavigation"
  ],
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "host_permissions": [
    "https://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-bookmark@byteperks.com",
      "strict_min_version": "60.0"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/bookmark.png",
        "assets/bookmarkdark.png",
        "assets/play.png",
        "assets/delete.png",
        "assets/save.png"
      ],
      "matches": [
        "https://*.youtube.com/*"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png",
      "128": "assets/icon-128.png"
    },
    "default_title": "YT Bookmarks",
    "default_popup": "popup.html"
  }
}