Free browser extension to modify HTTP headers and cookies
About Header Override: Modify HTTP Headers and Cookies
Header Override is a free browser extension that lets you modify HTTP request and response headers and cookies using URL-scoped rules. Create local profiles to switch between different configurations. Available for Chrome, Firefox, and Edge.
PlatformsBrowser extension
✓ VerifiedOct 30, 2026
Key features
- Modify HTTP request and response headers
- Edit cookies with URL-scoped rules
- Switch between local profiles
- Works in Chrome, Firefox, and Edge
Made by
the Header Override: Modify HTTP Headers and Cookies team
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