Examine source code of gooreplacer

{
  "name": "Gooreplacer",
  "description": "A browser extension to block/redirect URLs and modify headers",
  "homepage_url": "https://liujiacai.net/gooreplacer",
  "version": "4.3.2",
  "manifest_version": 3,
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "img/16.png",
    "32": "img/32.png",
    "48": "img/48.png"
  },
  "permissions": [
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "declarativeNetRequestFeedback",
    "storage"
  ],
  "options_ui": {
    "page": "option.html",
    "open_in_tab": true
  },
  "host_permissions": [
    "http://*/",
    "https://*/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gooreplacer@liujiacai.net"
    }
  }
}