Examine source code of Aniskip

{
  "name": "Aniskip",
  "version": "1.9.0",
  "description": "An extension which gives the option to skip anime opening and endings on various streaming sites",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": false
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "icon_16.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.animeonsen.xyz/watch/*",
        "*://animepahe.pw/play/*/*",
        "*://animepahe.com/play/*/*",
        "*://animepahe.org/play/*/*",
        "*://www.crunchyroll.com/*",
        "*://beta.crunchyroll.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.animeonsen.xyz/watch/*",
        "*://static.crunchyroll.com/*",
        "*://kodik.info/*",
        "*://vibeplayer.site/*",
        "*://*.vibeplayer.site/*",
        "*://*.pstream.net/e/*",
        "*://filemoon.sx/e/*",
        "*://*.vvid.cc/*",
        "*://kwik.cx/e/*",
        "*://streamtape.com/*",
        "*://4anime.to/*",
        "*://aniboom.one/*",
        "*://dood.la/*",
        "*://dood.to/*",
        "*://dood.ws/*",
        "*://mixdrop.co/e/*",
        "*://mp4.sh/*",
        "*://www.mp4upload.com/*",
        "*://www6.mp4upload.com/*"
      ],
      "js": [
        "player-script.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "manifest_version": 3,
  "background": {
    "service_worker": "background-script.js",
    "scripts": [
      "background-script.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c67645fa-ad86-4b2f-ab7a-67fc5f3e9f5a}"
    }
  },
  "host_permissions": [
    "*://api.aniskip.com/*",
    "*://api.malsync.moe/*",
    "*://graphql.anilist.co/*",
    "*://beta-api.crunchyroll.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "window-proxy-script.js"
      ],
      "matches": [
        "https://beta.crunchyroll.com/*"
      ]
    }
  ]
}