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Preview of ModHeader By GreatJIN

ModHeader By GreatJIN by Byungsoo JIN

Modify, remove, and inspect HTTP request headers with local profile-based rules using blocking webRequest.

Experimental
Available on Firefox for Android™
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About this extension
ModHeader By GreatJIN is a personal header modification tool for testing and debugging HTTP request behavior.

It lets users create local profiles and rules to set, append, or remove request headers for matching URLs. It includes diagnostics for checking which rules match a target URL and inspecting request
header behavior during development.

This add-on stores rules locally and does not transmit collected data to external services.
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Permissions and data

Required permissions:

  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Version
0.1.18
Size
231.51 KB
Last updated
4 hours ago (Jun 9, 2026)
License
All Rights Reserved
Version History
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