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
Manifest V2
By: Didierfred
Rating: 4.69 
(29)
Weekly download count: 214
Firefox on Android: No
Permissions:
- storage
- webRequest
- webRequestBlocking
- <all_urls>
- tabs
Size: 151.86K
URLs: Website
Full description: See detailed description
Ranking
Other platforms
Not available on Android
Not available on Edge
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spammy, or outdated.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 straightforward to use
- Modern and clean user interface
- Open source and free to use
- Works well for adding request headers
Cons
- Does not work for response headers
- Limited capability with URL modification
- Users have difficulty with certain feature implementations
- Some users report it fails to modify headers as expected
Most mentioned
- Limited functionality with response headers
- Issues with modifying URL parts
- Need for better UI conveniences (like adding sites more easily)
- Desire for real-time indication of rules being applied
User reviews
by 敬念法轮大法好远离疫情, 2025-02-12
by Firefox user 16584712, 2024-11-24
by Firefox user 13781929, 2024-09-11
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 impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- Low ******* ****** ** *** ********* ********
Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of simple-modify-headers. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details