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Header Editor vs Redirector: catalog facts
Header Editor	Redirector
Free Free and open source.	Free Free to install from each browser's add-on store.
Browser extension	Browser extension
Edits request and response headers Can modify response bodies	Wildcard and regular expression patterns with capture substitution Same add-on for Firefox, Chrome, Edge and Opera
Rule writing assumes some knowledge of HTTP	Writing regular expression rules takes some practice The project page was last updated in 2020
Browser extension	Browser extension
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.