Examine source code of ProxyBlocker

{
  "manifest_version": 2,
  "name": "Proxy-blocker",
  "description": "Blocks requests to any webiste that are in below list ",
  "version": "1.1resigned1",
  "icons": {
    "32": "icons/logo_32.png",
    "48": "icons/logo_48.png",
    "64": "icons/logo_64.png"
  },
  "applications": {
    "gecko": {
      "strict_min_version": "56.0a1",
      "id": "{9f902ca7-d162-40ea-8350-bf7c1ba4a6ad}"
    }
  },
  "background": {
    "scripts": [
      "background/proxy-handler.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "permissions": [
    "proxy",
    "storage"
  ]
}