Examine source code of MarkN Video Speed

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.0.3",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "homepage_url": "https://github.com/MarkN2000/MarkNVideoSpeed",
  "browser_specific_settings": {
    "gecko": {
      "id": "marknvideospeed@markn2000.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "action": {
    "default_title": "__MSG_extName__",
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "32": "assets/icons/icon32.png",
      "48": "assets/icons/icon48.png",
      "128": "assets/icons/icon128.png"
    }
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "32": "assets/icons/icon32.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "js": [
        "src/lib/storage.js",
        "src/lib/actions.js",
        "src/lib/domainFilter.js",
        "src/lib/speedApplier.js",
        "src/lib/mediaRegistry.js",
        "src/lib/keyHandler.js",
        "src/lib/hud.js",
        "src/content/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ]
}