# Script Blocker Ultimate (NoScript, Disable JS)

> Best Script Blocker for Firefox. (Best in Performance, This addon does NOT track user activities same as others)

Canonical page: [https://chrome-stats.com/d/script-blocker-ultimate](https://chrome-stats.com/d/script-blocker-ultimate)

## Overview

- **ID:** `script-blocker-ultimate`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mojtaba Daneshi
- **Category:** web-development,privacy-security,other
- **Daily users:** 2,324
- **Weekly downloads:** 33
- **Rating:** 4.63 / 5 (35 ratings)
- **Version:** 4.2.1
- **Last updated:** 2025-05-23
- **First published:** 2019-04-21
- **Size:** 48 KB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/script-blocker-ultimate/)
- **Website:** [http://PopupBlocker.ir](http://popupblocker.ir/)

## Description

**Script Blocker Ultimate** is a powerful Chrome extension designed to enhance your browsing by blocking JavaScript and requests with ease, improving security and page load performance. It supports both desktop and Android platforms.

With flexible modes such as "Allow all," "Block all," "Block all but whitelist," and "Allow all but blacklist," users have complete control over script execution. The extension also features a robust request blocker to selectively block scripts, images, or videos, helping to eliminate ads and enhance privacy. Default blocking includes Google Analytics and Adsense scripts, which can be customized.

The use of wildcards in whitelisting and blacklisting domains makes configuration simple and effective. Script Blocker Ultimate respects user privacy and does not track activity, setting it apart from other script blockers. Regular webpage issues caused by blocking scripts can be resolved via the whitelist feature, making it user-friendly without compromising security.

For feedback or support, users can contact the developer directly via email. Enjoy a smoother, safer browsing experience with Script Blocker Ultimate!

## Rankings

- #1,992 — Overall
- #213 — Web Development
- #311 — Other extensions
- #359 — Privacy & Security
- #6 — script
- #30 — disable

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `<all_urls>`
- `notifications`
- `webRequest`
- `webRequestBlocking`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users praise Script Blocker Ultimate for being easy to use and lightweight, with effective, early blocking of scripts (including autoplay) and flexible white/blacklisting. It’s viewed as a simpler alternative to NoScript and privacy-friendly. However, common criticisms include the lack of logs and poor visibility of blocked/allowed URLs, plus requests for more granular controls (per-link rules, regex support). Some reviewers also want more proof of the claimed no-tracking behavior.

### Pros

- Easy to use and lightweight; designed to be simpler than NoScript.
- Blocks scripts early in the page load, reducing script activity and improving page performance.
- Flexible black/white lists with wildcard support for precise control.
- Privacy-friendly operation with claims of not tracking user activity.
- Effectively blocks intrusive scripts such as autoplay and random in-page scripts.

### Cons

- No built-in logs or a visible list of blocked/allowed domains, making auditing difficult.
- Limited visibility of what will be allowed when whitelisting; it’s hard to quickly see which URLs are blocked or allowed.
- Users frequently request more controls (per-link enable/disable, per-domain rules) and features like regex support, which are currently missing.
- Some reviewers are skeptical about the privacy claims and would like verifiable proof of not tracking user activity.

## Similar extensions and apps

- [Popup Blocker Ultimate](https://chrome-stats.com/d/popup-blocker-ultimate) — 50,915 users, 4.67 / 5
- [Script Blocker Plus](https://chrome-stats.com/d/script-blocker-plus) — 1 users
- [Script Blocker Plus](https://chrome-stats.com/d/script-blocker-browser)
- [No-Script Suite Lite](https://chrome-stats.com/d/no-script-suite-lite-revived) — 312 users, 2.60 / 5
- [Script Blocker Plus](https://chrome-stats.com/d/control-script-blocker)
- [Ultimate AdBlocker](https://chrome-stats.com/d/ultimate-adblocker) — 72 users
- [bScript](https://chrome-stats.com/d/bscript) — 1 users
- [AdBlocker Ultimate](https://chrome-stats.com/d/adblocker-ultimate) — 1,070,287 users, 4.77 / 5
- [Site Blocker Pro](https://chrome-stats.com/d/site-blocker-pro) — 1 users
- [Super Ad Block: Total Privacy](https://chrome-stats.com/d/super-ad-block-total-privacy) — 106 users
- [ADBlocker Express Ultimate Pro](https://chrome-stats.com/d/adblocker-express-ultimate-pro) — 65 users, 5.00 / 5
- [YesScript2](https://chrome-stats.com/d/yesscript2) — 1,187 users, 4.51 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/script-blocker-ultimate)