Chrome extension source viewer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Chrome extension source viewer",
  "short_name": "CRX Viewer",
  "description": "View source code of Chrome extensions, Firefox addons or Opera extensions (crx/nex/xpi) from the Chrome web store and elsewhere.",
  "version": "1.7.0",
  "manifest_version": 3,
  "minimum_chrome_version": "88",
  "background": {
    "service_worker": "service_worker.js"
  },
  "action": {
    "default_icon": {
      "19": "icons/19.png",
      "38": "icons/38.png"
    },
    "default_title": "Inspect contents of the current browser extension",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html#optionsV2"
  },
  "permissions": [
    "tabs",
    "storage",
    "contextMenus",
    "downloads",
    "declarativeContent"
  ],
  "host_permissions": [
    "*://clients2.google.com/service/update2/crx*",
    "*://clients2.googleusercontent.com/crx/download/*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "incognito": "split"
}