Examine source code of SpeedX — Video Speed Controller

{
  "manifest_version": 3,
  "name": "SpeedX — Universal Video Speed Controller",
  "version": "2.0",
  "description": "Control playback speed of any video on YouTube, Netflix, Prime Video, Hotstar, Disney+, and all OTT platforms.",
  "author": "SpeedX Team",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "SpeedX — Video Speed Controller"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8697a21-987d-4b59-a2e1-4560a63bc184}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle",
      "all_frames": true,
      "match_about_blank": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/inject.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true,
      "world": "MAIN"
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*",
        "content/inject.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}