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HeaderFlex

ExtensionDeveloper Tools15 users
Item media 1 (screenshot) for HeaderFlex

Overview

Modify HTTP request & response headers — the ModHeader alternative. One-click ModHeader import, profiles, mock APIs. 100% local.

Modify request & response headers with profiles, URL matching and declarativeNetRequest — fully local, no accounts, no tracking.

Details

  • Version
    1.0.8
  • Updated
    July 21, 2026
  • Offered by
    knothhe
  • Size
    1.8MiB
  • Languages
    2 languages
  • Developer
    Email
    knothhe@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

HeaderFlex has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

HeaderFlex handles the following:

Authentication information
Web history
Website content

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes
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