Examine source code of VTT to SRT Sidebar

{
  "manifest_version": 2,
  "name": "VTT to SRT Sidebar",
  "version": "0.1.0",
  "description": "Convert WebVTT captions to SRT in a sidebar.",
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_title": "VTT to SRT",
    "open_at_install": false
  },
  "browser_action": {
    "default_title": "VTT to SRT"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "64": "assets/icon64.png",
    "96": "assets/icon96.png",
    "128": "assets/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "vtt2srt@littletools.org",
      "strict_min_version": "102.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects": false,
        "collects_personally_identifiable_info": false,
        "collects_personal_activity": false,
        "collects_web_activity": false,
        "collects_health_info": false,
        "collects_financial_info": false,
        "collects_location_info": false,
        "collects_user_authentication_info": false,
        "collects_contacts": false
      }
    }
  },
  "permissions": [],
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' https://fonts.googleapis.com; font-src https://fonts.gstatic.com"
}