Examine source code of DuoTabz

{
  "manifest_version": 2,
  "name": "DuoTabz",
  "version": "1.0",
  "description": "Split-view browsing, Portrait Mode & Eye Comfort for Firefox.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Lancer DuoTabz"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "duotabz@gaorfg.bit",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}