Examine source code of Crunchyroll Skipper

{
  "name": "Crunchyroll Skipper",
  "version": "1.0",
  "description": "Allows intros and outros to be skipped through a skip button per anime episode on Crunchyroll",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://static.crunchyroll.com/vilos-v2/web/vilos/player.html*"
      ],
      "js": [
        "content_script.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "*://www.crskipper.com/*",
    "webRequest"
  ],
  "manifest_version": 2
}