Request RegEx Filter

Name: Request RegEx Filter
Rating: 4.6 (5 reviews)
Author: Henry Lu

This Add-on will filter all HTTP requests (including requests for javascript files, images etc) based on the list of regular expressions the user provides. The addon works off of a Deny-list configured via the Options/Settings page for the Addon

Download

Install

Features & Capabilities

To configure this Add-on, Open the Add-ons/Extensions page of your browser or type "about:addons" in the address bar in Firefox.

Click on "Options" for the Request RegEx Filter add-on.

Then you can add or remove from the list of Regular Expressions that will denylist the http request.

For more details on how to write a regular expression, here are some resources:

For Example: Add the following regular expression to the denylist

http(s)?:\/\/ads[.]

and it will block all requests to websites that start with "ads." on http or https. this means any requests to get javascript or other content from http://ads.example.com would be blocked.

This regex is purely for demonstration purposes. The above Regular Expression has the limitation that any website starting with "ads." would be blocked. So if you legitimately want to be visiting a site with a domain name prefixed with "ads." you would avoid using this regex.

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

1.1resigned1 Last updated: 2024-04-25

Version code:

5728808

Creation date:

2017-09-19

Risk:

Permissions:

Size:

10.16KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 34,127 ▲ 1,742

Other rankings

#29 in request keyword 25

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Henry Lu

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/request-regex-filter/

Website:

https://github.com/Raido0812/Raido.RequestRegExFilter.WebExtension

User Reviews

Simply put, this extension works, nothing more. The regexes must be input one by one, and it pretends to offers a way to save the list: saving the add-on's Page... Which, of course, cannot be loaded, afterwards... So, yes, it works, but not in any practical sense, unless someone wants to block two or three addresses and nothing else. Other blockers have addressed it in a much easier way, by using a textarea, with each line being a regex, allowing copy/paste.

by Cy*****, 2025-07-30

by 全民*****, 2025-04-17

by 远离*****, 2025-03-13

View all user reviews ›

Is Request RegEx Filter Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Request RegEx Filter requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Request RegEx Filter has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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