Examine source code of Same Domain On Tab Close

{
  "manifest_version": 2,
  "name": "Same Domain On Tab Close",
  "version": "2026.3.16",
  "description": "After you close a tab, switches to another tab from the same domain according to user-defined rules.",
  "browser_specific_settings": {
    "gecko": {
      "id": "@same-domain-on-tab-close.shajirr",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "sessions",
    "menus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "24": "icon.svg",
      "32": "icon.svg",
      "48": "icon.svg",
      "64": "icon.svg"
    },
    "default_title": "Same Domain Tab Focus: ON"
  },
  "icons": {
    "24": "icon.svg",
    "32": "icon.svg",
    "48": "icon.svg",
    "64": "icon.svg"
  }
}