Examine source code of YouTubeAdSkip

{
  "manifest_version": 2,
  "name": "YouTubeAdSkip",
  "version": "1.5",
  "description": "Automatically mutes YT videos when an ad starts playing. Then skips the ad as soon as possible.",
  "icons": {
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "48.0",
      "id": "{41d0609d-e956-42d2-91d0-2f85219b7cf8}"
    },
    "gecko_android": {
      "id": "{41d0609d-e956-42d2-91d0-2f85219b7cf8}",
      "strict_min_version": "113.0"
    }
  },
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "https://*.youtube.com/*",
        "https://youtube.com/*"
      ]
    }
  ]
}