Examine source code of LightProxy

{
  "applications": {
    "gecko": {
      "id": "{682a4895-858c-2018-a8c2-a28f872a9329}",
      "strict_min_version": "60.0a1"
    }
  },
  "name": "LightProxy",
  "short_name": "LightProxy",
  "version": "1.0.12",
  "description": "A lightweight proxy switcher. Multiple protocols including HTTP, SOCKS4, SOCKS5, FTP, SSL and PAC scripts are supported. Firefox >= 60.0 required.",
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_title": "LightProxy",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "images/icon16.png",
    "24": "images/icon24.png",
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "incognito": "spanning",
  "permissions": [
    "proxy",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "js/jquery-3.2.1.min.js",
      "js/background.js"
    ]
  },
  "manifest_version": 2
}