Examine source code of Archive Page

{
  "manifest_version": 2,
  "name": "Archive Page",
  "version": "492",
  "description": "Save the current page to the Wayback Machine and check existing snapshots.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f5edf488-61db-40a8-b212-71e28d6e9038}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon16.png",
      "32": "img/icon32.png",
      "48": "img/icon48.png",
      "96": "img/icon96.png",
      "128": "img/icon128.png"
    },
    "default_title": "Archive Page",
    "default_popup": "js/popup.html"
  },
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "96": "img/icon96.png",
    "128": "img/icon128.png"
  },
  "permissions": [
    "tabs"
  ]
}