Examine source code of Gooreplacer

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_appName__",
  "version": "3.13.0",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "downloads",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "page": "background/index.html"
  },
  "icons": {
    "16": "ui/img/16.png",
    "32": "ui/img/32.png",
    "48": "ui/img/48.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "ui/img/16.png",
      "32": "ui/img/32.png",
      "48": "ui/img/48.png"
    },
    "default_title": "Modify, block URLs & Headers",
    "default_popup": "ui/popup.html"
  },
  "options_ui": {
    "page": "ui/option.html",
    "chrome_style": false,
    "open_in_tab": true
  },
  "author": "https://liujiacai.net",
  "homepage_url": "https://github.com/jiacai2050/gooreplacer",
  "content_security_policy": "default-src 'unsafe-eval' 'self' https://cdn.jsdelivr.net http://localhost:8097; style-src http://* https://* 'unsafe-inline' 'unsafe-eval'; connect-src http://* http://localhost:* ws://localhost:* ; font-src https://*; img-src 'self' data:",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae4f91dd-4662-46a4-8923-05c2709b6139}"
    }
  }
}