LAN port scan forbidder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "LAN port scan forbidder",
  "description": "Forbid non-LAN web to access LAN",
  "manifest_version": 2,
  "version": "0.6.2",
  "homepage_url": "https://github.com/garywill/LAN-port-scan-forbidder/",
  "author": {
    "name": "Garywill",
    "url": "https://garywill.github.io"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*/*",
    "ws://*/*",
    "wss://*/*",
    "ftp://*/*",
    "contextMenus",
    "storage"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_icon": "icon_gray.png",
    "default_title": "LAN port scan forbidder"
  },
  "commands": {
    "_execute_browser_action": {
      "description": "Click toolbar button"
    },
    "toggle_t": {
      "description": "Toggle for one tab"
    },
    "toggle_h": {
      "description": "Toggle for one tab and new tabs opened by it"
    },
    "toggle_global": {
      "description": "Toggle globally enable/disable"
    }
  },
  "options_ui": {
    "page": "options.html"
  }
}