Examine source code of Per-Tab Volume Booster

{
  "manifest_version": 3,
  "name": "Per-Tab Volume Booster",
  "version": "1.1.0",
  "description": "Control and boost each Firefox tab's media volume up to 600%.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Per-Tab Volume Booster",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "travisrice-nubya-tab-volume-booster-2026@local.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}