Examine source code of yskproxy

{
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "description": "yskproxy, manage pac easy and comfortable",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background/proxy-handler.js"
    ]
  },
  "manifest_version": 2,
  "name": "yskproxy",
  "permissions": [
    "<all_urls>",
    "tabs",
    "proxy",
    "privacy",
    "webRequest",
    "storage"
  ],
  "version": "1.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "yskproxy-firefox-extension@netroby.com",
      "strict_min_version": "60.0"
    }
  }
}