Examine source code of KHackBar

{
  "manifest_version": 3,
  "name": "KHackBar",
  "version": "1.5.1",
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "cookies",
    "contextMenus",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "KHackBar"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "khackbar@khitminnyo.us",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}