Examine source code of Freeze Used Page

{
  "manifest_version": 2,
  "name": "Freeze Used Page",
  "version": "1.2.4",
  "description": "Freeze updates on the current page.",
  "icons": {
    "64": "ico64.png",
    "128": "ico128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef6a19df-26a4-4f6a-b76e-6d2b9d80bf88}",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Freeze Used Page",
    "default_icon": {
      "64": "ico64.png",
      "128": "ico128.png"
    }
  },
  "web_accessible_resources": [
    "toggle-freeze.js"
  ]
}