Examine source code of ReelSleek - Video Control for Instagram

{
  "manifest_version": 3,
  "name": "ReelSleek",
  "version": "3.6.12",
  "description": "Adds persistent volume, precision seeking, and smart mute controls to Instagram Reels.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "optional_permissions": [
    "webNavigation"
  ],
  "host_permissions": [],
  "optional_host_permissions": [
    "*://*.instagram.com/*"
  ],
  "icons": {
    "48": "icons/logo-48.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "css": [
        "content/base.css"
      ],
      "js": [
        "content/shared.js",
        "content/audioControl.js",
        "content/videoControl.js",
        "content/autoscroll.js",
        "content/theaterMode.js",
        "content/rotate.js",
        "content/ambientMode.js",
        "content/messaging.js",
        "content/index.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "instasound@addon.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/logo-no-bg.png",
        "content/controls.html"
      ],
      "matches": [
        "*://*.instagram.com/*"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "48": "icons/logo-48.png"
    },
    "default_title": "ReelSleek",
    "default_popup": "popup/index.html"
  }
}