FirefoxBar/HeaderEditor

Health v2 · maintenance only

Adoption not part of the score

1286 stars · 348 forks observed · 2026-09-03

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Header Editor is a browser extension (WebExtension) for Firefox, Chrome, and Edge that lets users modify HTTP requests and responses via rules, including request/response headers, response bodies, redirects, and request cancellation. It supports custom functions for fine-grained control and rule import/export with cloud sync.

Use cases

• modify request headers in the browser
• rewrite response bodies of web pages
• redirect specific URLs to other addresses
• block or cancel unwanted requests
• add CORS or referer headers to fix sites
• sync header rules across devices
• debug and test HTTP header behavior

When to choose

• you need rule-based or scripted modification of browser HTTP traffic
• you want a free, no-tracking extension across Firefox, Chrome, and Edge
• you need to redirect or cancel requests without a full proxy setup

When to avoid

• you need to intercept traffic outside the browser
• you require proxy-level or system-wide request modification
• you need automated testing of HTTP APIs rather than interactive browser use

Facets

plugin · maturity active

http-client middleware developer-tools browser-extensions web-development developer-tools privacy browser-extension browser cross-platform http-headers request-modification webextension response-body-rewrite request-redirect firefox-addon chrome-extension edge-extension

Member repositories

For agents

markdown · JSON · MCP: product_card(name="FirefoxBar/HeaderEditor")