Examine source code of NoiseLabel

{
  "manifest_version": 2,
  "name": "NoiseLabel",
  "version": "1.0.0",
  "description": "Quickly label tracks as 'Noisy' / 'Low noise' / 'Clear' with hotkeys and export CSV.",
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "NoiseLabel"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "commands": {
    "label_noisy": {
      "suggested_key": {
        "default": "Ctrl+Shift+1"
      },
      "description": "Mark current track as Noisy"
    },
    "label_low": {
      "suggested_key": {
        "default": "Ctrl+Shift+2"
      },
      "description": "Mark current track as Low noise"
    },
    "label_clear": {
      "suggested_key": {
        "default": "Ctrl+Shift+3"
      },
      "description": "Mark current track as Clear"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "noiselabel@example.com",
      "strict_min_version": "79.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}