Examine source code of Chapter Skipper

{
  "manifest_version": 2,
  "name": "Chapter Skipper",
  "version": "2.3.1.0",
  "description": "Jumps past sponsor, intro and outro chapters using the timestamps the author published.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ffbade5-8d56-48b7-ab90-55a5f5198ac5}",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "src/popup.html",
    "default_title": "Chapter Skipper",
    "default_icon": {
      "32": "images/icon32.png",
      "48": "images/icon48.png",
      "64": "images/icon64.png",
      "96": "images/icon96.png",
      "128": "images/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/core.js",
        "src/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ]
}