Efficient Header Modification Tool for Firefox

Header Editor is a free Firefox extension designed for web development, allowing users to modify request and response headers as well as the response body. With its straightforward interface, it facilitates the cancellation and redirection of requests, making it a valuable tool for developers looking to test and debug their web applications. The extension is lightweight and free from advertisements or data collection, ensuring a seamless user experience.

This extension is particularly useful for those engaged in web development, as it provides essential features to manipulate headers effectively. Users can also benefit from a lite version, access the source code, report bugs, and contribute to translations. For those wanting to stay updated with the latest features, a self-distribution version is available for installation.

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App specs

  • License

    Free

  • Version

    5.2.7
  • Latest update

  • Platform

    firefox

  • Downloads

    3

    Last month's downloads

    • 3
  • Size

    784.53 KB

  • Developer

Program available in other languages



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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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Is Header Editor safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

  • Virus free
  • Spyware free
  • Malware free
  • Verified by Security Partners

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Scan Info

Last scan
Saturday, October 18, 2025
Scan provider
VirusTotal · Full report

File Integrity

File
5.2.7.xpi
SHA256
7edc8aa17e79dc3271fa3ece87b9c4f1ad1cc2ac68574723d565c764048fbdc1
SHA1
270346e3142115258bffaae3ea9cc37311e32c18

Softonic security commitment

Header Editor has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.