http_shield_firefox.js File Reference

This file contains Firefox-specific functions for Network Boundary Shield. More...

Functions
function async	beforeSendHeadersListener (requestDetail)

Detailed Description

This file contains Firefox-specific functions for Network Boundary Shield.

This file contains Firefox specific functions for Network Boundary Shield.

Author

Copyright (C) 2020 Pavel Pohner

Copyright (C) 2020-2021 Martin Bednář

License:

SPDX-License-Identifier: GPL-3.0-or-later

This file contains webRequest API listeners. These listeners handle HTTP requests in the "before send headers" phase and handle messages (on message event).

NBS for Firefox uses the DNS web extension API to resolve domain names. As the domain names are cached and needs to be resolved without NBS, the performance impact should be negligible. The DNS API is not used for proxied requests to prevent DNS leaks of resolutions that would be initiated by the DNS proxy. See https://pagure.io/JShelter/webextension/issue/41 for more details.

Function Documentation

beforeSendHeadersListener()

function async beforeSendHeadersListener

(

requestDetail

)

The event listener, hooked up to webRequest onBeforeSendHeaders event. Receives detail of HTTP request in requestDetail. Catches the request, analyzes its origin and target URLs and blocks it/permits it based on their IP adresses. Requests coming from public IP ranges targeting the private IPs are blocked by default. Others are permitted by default.

Parameters

requestDetail

Details of HTTP request.

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