Is simple-modify-headers safe?

Clean risk

This extension adds, changes, or removes HTTP(S) request and response headers using user-defined rules.

It lets users create a rules table to rewrite headers for selected URLs. Users can import and export the configuration as JSON, including support for the ModifyHeaders plugin format. Its permissions allow it to store settings, access tabs, and intercept web requests across all URLs to apply the configured header changes.

DidierfredFirefox Add-ons
0Risk
Who publishes it

Didierfred - no other listings under this identity

What this publisher told the store about itself, and the other listings that told it the same thing.

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Updated 15 October 2026amo-919023