Examine source code of Reuse Tabs

{
  "manifest_version": 2,
  "name": "Reuse Tabs",
  "version": "0.1.7",
  "description": "Prevents duplicate tabs by switching to existing ones. Handles in-page navigation, external apps, and offers exempt duplicates, stale tab reloading, and toast notifications.",
  "permissions": [
    "tabs",
    "menus",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_action": {
    "default_icon": "icon.svg",
    "default_popup": "popup.html",
    "default_title": "Reuse Tabs"
  },
  "background": {
    "scripts": [
      "background-core.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reuse-tabs@mturley"
    }
  }
}