Reviews of simple-modify-headers

By: Didierfred Add-on

List of user reviews and ratings for simple-modify-headers

Total ratings

4.62 (Rating count: 37)

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Review summary

Users generally find simple-modify-headers easy to use and effective for adding custom request headers, with several reviews highlighting its lightweight, no-frills design and lack of ads. It’s praised for a straightforward workflow to insert headers quickly. However, several limitations recur: it does not handle response headers (only request headers), and it offers limited URL manipulation—you can’t easily edit URL parts or apply complex URL rules. Some sites/URLs don’t work (e.g., localhost/127.0.0.1:8080; Chrome Web Store). DevTools headers may appear raw, which can mislead whether changes are applied. Managing blocked sites is not intuitive, and a status indicator would help.

Pros

Simple and easy to use.
Works for adding request headers.
No ads.
Lightweight/minimal UI.

Cons

Does not support response headers; only request headers.
Limited URL manipulation; cannot edit URL parts or apply complex URL rules.
Doesn't work for some sites/URLs (e.g., localhost 127.0.0.1:8080, Chrome Web Store).
Headers shown in DevTools may appear raw/unmodified, which can mislead whether changes are applied.
Hard to manage blocked sites; adding sites to block is not intuitive; lacks a straightforward status indicator.

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User Reviews

Recent rating average: 4.50

All time rating average: 4.62

Upgrade to see all 45 reviews

7% (3)

Date	Author	Comment
2026-06-23	Fi*****	After installing this add-on, here’s what happened in my case: Improvements I used to be unable to watch Netflix and Amazon Prime videos in Firefox, but now I can. Issues When YouTube videos are shared and embedded on the social media platform X, I frequently get a message saying “Cannot play on this device” when I click play (however, I can watch them if I go to the YouTube website. The issue only occurs with YouTube videos embedded on X). Update: I’m also getting the “Cannot play on this device” message and can’t play YouTube videos embedded on other websites.
After installing this add-on, here’s what happened in my case: Improvements I used to be unable to watch Netflix and Amazon Prime videos in Firefox, but now I can. Issues When YouTube videos are shared and embedded on the social media platform X, I frequently get a message saying “Cannot play on this device” when I click play (however, I can watch them if I go to the YouTube website. The issue only occurs with YouTube videos embedded on X). Update: I’m also getting the “Cannot play on this device” message and can’t play YouTube videos embedded on other websites.
2026-03-18	Fi*****	Top e não tem anúncios
Top e não tem anúncios
2025-10-24	fe*****

2025-10-02	Ju*****	Permet d'ajouter un header Authorization Bearer facilement
Permet d'ajouter un header Authorization Bearer facilement
2025-05-09	Fi*****

2025-05-09	Fi*****	Does nothing, headers are not added for 127.0.0.1:8080/*
Does nothing, headers are not added for 127.0.0.1:8080/*
2025-04-15	Fi*****

2025-04-05	si*****	My fix for r*ddit while using Skip Redirect addon.
My fix for r*ddit while using Skip Redirect addon.
2025-03-31	远离*****

2025-03-19	Va*****	Beware - headers in Developer Tools are raw. If you see them unmodified, it does not mean the extension does not work..
Beware - headers in Developer Tools are raw. If you see them unmodified, it does not mean the extension does not work..