FF Headers
FF Headers is a Firefox extension for adding, overriding, and removing HTTP request headers. It supports URL-based rules, per-rule enable and pause controls, current-page filtering, and JSON import and export, with data stored locally in the browser.
Overview
10 featuresIn the Browser DevTools & extensions space, FF Headers takes a focused approach. Editing, overriding, or removing HTTP request headers for selected websites without relying on a cloud service. FF Headers is a B2B product aimed at web developers and QA testers. It is available for free. It ships for the web and embeddable surfaces.
powerkf builds and maintains FF Headers, and it first shipped in 2026. Key capabilities include add headers, remove headers, and override headers. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
- Add headers
- Remove headers
- Override headers
- URL filters
- Current-page filter
- Rule toggles
- Pause extension
- JSON import
- JSON export
- Local storage
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
Frequently asked questions about FF Headers
- What is FF Headers?
- Editing, overriding, or removing HTTP request headers for selected websites without relying on a cloud service. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who is FF Headers for?
- FF Headers is a B2B product built for web developers and QA testers.
- Does FF Headers have a free plan?
- Yes — FF Headers is free to use.
- What platforms does FF Headers run on?
- FF Headers runs on the web and embeddable surfaces.
- Is FF Headers still active?
- Unverified. FF Headers has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- Who develops FF Headers?
- FF Headers is developed by powerkf.
- How long has FF Headers been around?
- FF Headers first shipped in 2026.
- What languages does FF Headers support?
- The interface is available in 32 languages, including Czech, German, and Greek.
Similar projects
Closest matches by what these projects do