simple-modify-headers
The extension rewrite the header (request or response) based on a rules table. It 's possible to add, modify or remove header fields for a choosen url pattern. It's possible to import/export the configuration
Simple Modify Headers: Firefox Add-On - Header Modification Tool
"Simple Modify Headers" is a Firefox extension designed to rewrite HTTP(S) request or response headers via specified rules. Users can add, modify, or delete header fields for selected URL patterns. It supports configuration export/import, with compatibility for Modifyheaders plugin format.
Add-on stats
Weekly download count: 161
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- storage
- webRequest
- webRequestBlocking
- <all_urls>
- tabs
Size: 151.86K
URLs: Website
Ranking
Other platforms
Not available on Android
Not available on Edge
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Add-on summary
The extension rewrite the headers based on a rules table.
It's possible to:
- add , modify or delete header field for HTTP(S) request or response
- export the configuration in a file (json format)
- import the configuration from a file , it support the format of the Modifyheaders plugin
- choose urls on which the modifications applies
The code is opensource under Mozilla Public License 2.0
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- Simple and works well for adding request headers
- Modern and clean UI that is easy to understand
- Open source and free without paid features
Cons
- Cannot add, change, or remove parts of URL in many cases
- Does not support modifying response headers
- Difficult to change user-agent for specific sites
Most mentioned
- Basic functionality but some features are lacking
- Issues with modifying URL components
- Need for better user feedback on active modifications
User reviews
by Firefox user 16584712, 2024-11-24
by Firefox user 13781929, 2024-09-11
by Firefox user 12337062, 2024-06-05
Add-on safety
Risk impact
simple-modify-headers requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
simple-modify-headers is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
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