Examine source code of FadingTAB

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.2.0",
  "description": "__MSG_extDescription__",
  "default_locale": "zh_CN",
  "browser_specific_settings": {
    "gecko": {
      "id": "fadingtab@extension",
      "strict_min_version": "123.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "tabs",
    "bookmarks",
    "storage",
    "idle",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}