index.md

---

title: webRequest.HttpHeaders
slug: Mozilla/Add-ons/WebExtensions/API/webRequest/HttpHeaders
page-type: webextension-api-type
tags:
  - API
  - Add-ons
  - Extensions
  - HttpHeaders
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - webRequest
browser-compat: webextensions.api.webRequest.HttpHeaders

---

{{AddonSidebar()}}

An array of HTTP headers. Each header is represented as an object with two properties: name and either value or binaryValue.

Type

An array of objects. Each object has the following properties:

• name

  • : string. Name of the HTTP header.

• value {{optional_inline}}

  • : string. Value of the HTTP header if it can be represented by UTF-8. Either this property or binaryValue must be present.

• binaryValue {{optional_inline}}

  • : array of integer. Value of the HTTP header if it cannot be represented by UTF-8, represented as bytes (0..255). Either this property or value must be present.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

Note: This API is based on Chromium's chrome.webRequest API. This documentation is derived from web_request.json in the Chromium code.