LAN port scan forbidder

{
    "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"
    }
}