A header rule is not applying
Check that the rule is enabled, the header name is valid, and the URL filter matches the request URL shown in the browser Network tab.
Support
Header Override Support
For support, email support@headeroverride.com.
You can also use the support or request option on the official browser extension store listing when it is available.
URL filter patterns
Use the browser-supported filter syntax shown in the extension popup. Start with a narrow pattern for the site or API you are testing.
Permissions
Header Override asks for website access so your own rules can modify matching requests. Rules stay in local browser extension storage.
Store listings
For store-specific issues, you can also use the support or request option on the official Chrome, Edge, or Firefox extension listing when available.
What to include
Please include your browser name and version, the URL filter pattern you expected to match, the header name you configured, and what happened instead. Do not send passwords, access tokens, cookies, or private header values.
Privacy questions
Header Override stores rules locally in your browser and does not use analytics, tracking, advertising, remote code, or external servers. For details, read the Privacy Policy.