Cloudhood by Cloud.ru
This extension allows users to control request headers that will be embedded in all requests in Firefox Browser, where each override contains the following properties
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Extension Metadata
About this extension
This extension allows users to customize and override HTTP request headers in Firefox. Each header modification includes:  
Key Features
Ideal for developers, privacy-conscious users, and anyone needing fine-grained control over request headers.
- Header: The key of the HTTP header (e.g., 
User-Agent,Accept-Language). - Header Value: The custom value to be sent with the header.
 
Key Features
- Manage headers via a simple React-based popup interface.
 - Rules are stored in Firefox's local storage for persistence.
 - Applies modifications dynamically using Firefox’s 
declarativeNetRequestAPI (updateDynamicRules). - Compatible with Manifest V3.
 
Ideal for developers, privacy-conscious users, and anyone needing fine-grained control over request headers.
Rated 5 by 2 reviewers
Permissions and data
Required permissions:
- Block content on any page
 - Read your browsing history
 - Access browser tabs
 
Optional permissions:
- Access your data for all websites
 
More information
- Add-on Links
 - Version
 - 1.6.0
 - Size
 - 837.71 KB
 - Last updated
 - a month ago (Sep 28, 2025)
 - Related Categories
 - License
 - Apache License 2.0
 - Version History
 - Add to collection