RegEx Blocklist Firefox

RegEx Blocklist

Filter HTTP requests with Regular Expressions

Features & Capabilities

Regex Blocklist allows you to easily block urls using RegEx. This blocklist will not only stop pages from loading, but also images, scripts, style sheets, fonts and more.

Advantages over similar Add-ons

  • 100% open source
  • Support for RegEx flags (e.g. for case-insensitivity)
  • Additional allowlist
  • Easily test your blocklist against urls in the settings
  • High performance and low RAM usage
  • Automatic dark mode
Change blocklist settings To add new entries to the blocklist or to change entries, go to the Firefox Add-ons page (or press 'Ctrl+Shift+A') and select this Add-on. Then open the "Preferences" tab.

Add new entries To add a new entry to the blocklist click on "Add new Regex". Two new input field will appear. The first input field stores the actual Regular Expression, the second one stores additional flags such as i for enabling case-insensitivity.

Edit entries Each entry can be edited by simply clicking on the text fields and entering a Regular Expression. While editing the blocklist will be automatically updated, there's no need to save changes.

Validate entries To check whether your blocklist actually blocks an url you can enter a test url into the text field at the bottom. All matching entries of the blocklist will be marked green, all entries that don't match the url will be marked red. The colors will be updated automatically, even as you change entries of the blocklist.

User Growth & Download Statistics

Manifest V2 Add-on
By:
Aaron Erhardt
Daily users:
18 -1
Rating:
4.60
(5)
Version:
2.0 Last updated: 2020-12-01
Version code:
5143138
Creation date:
2020-05-29
Risk:
Moderate risk impact Low risk likelihood
Permissions:
Size:
95.90KB
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-19
Compare stats and ranking:

Ranking

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:
Aaron Erhardt
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/regex-blocklist/
Website:
https://github.com/AaronErhardt/Regex-Blocklist

User Reviews

Excellent.
by Fi*****, 2025-11-15

This blocker works... And that's all. It's not the smallest of them all, and it definitely is not the easiest to use. Regex rules must be inserted one by one, with no way to save or restore the list. It's not practical the way it is, now. A better approach would be to use a textarea to edit the rules (one per line, for example), then the save/restore functions wouldn't be really necessary.
by Cy*****, 2025-07-30

Лучшее! смог заблокировать рф сайты для браузера с прокси
by dw*****, 2025-02-14
View all user reviews ›

Is RegEx Blocklist 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.

RegEx Blocklist 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.

RegEx Blocklist 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 **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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Best RegEx Blocklist Alternatives

Here are some Firefox add-ons that are similar to RegEx Blocklist: