HTTP Headers Customize
'HTTP Headers Customize' extension rewrite http headers based on a rules.
What is HTTP Headers Customize?
'HTTP Headers Customize' is an add-on for Firefox that allows users to rewrite and customize HTTP headers based on predefined rules.
HTTP Headers Customize is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install HTTP Headers Customize if you trust the publisher.
HTTP Headers Customize has earned a fairly good reputation and likely can be trusted.