It marks the domain of the active tab untrusted, reloads the page and blocks scripts from running on it. An option for the user to stop a website eating up resources or doing malicious things even if it breaks the functionality of the page.

What is YesScript2?
YesScript2 is a Firefox extension designed to improve user security and browser performance. It gives you control over which scripts run on various websites, enhancing your safety and saving resources on your device. With one click, you can block scripts on a page, extend battery life and protect yourself from potential cyber threats. Despite the possible loss of some site functionality, this tool proves incredibly useful when balancing the trade-off between website performance and security.
Rating: 4.49 (77)
Version: 4.4resigned1 (Last updated: 2024-04-25)
Creation date: 2017-10-03
Weekly download count: 15
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
  • storage
  • tabs
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 18.13K
URLs: Website
Stats date:

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  • 3 states of blocking: full blocking (blocking internal and external scripts too), half blocking (allowing internal and blocking external scripts) and no blocking
  • single click operation
  • automatic page reload
  • utilizing Firefox's Sync feature to remember and auto restore settings across devices (version 53+ or local storage only)
  • compatible with desktop and mobile platforms
Pushing functionality from server side back to the users by running more codes on their computers instead of on the server is a tendency where the industry go and so web sites use more and more resources on the users' devices so their battery may go off faster. The other problem is that websites and web services become more and more vulnerable for cyber attacks using cross site scripting and other techniques. These can be solved with this extension with some trade off.

Turning off scripts on websites might break functionality. However if some of them use heavy scripting making your device slow or you worry about being hacked through that site then it is a good practice to block scripts if you want to visit them anyway.

This tool is just an option for you. There are other more sophisticated options like using the NoScript extension which is a great piece of work that gives you better security because it can block scripts before loading at all whereas YesScript2 blocks them after you activate it by clicking on the icon. However teaching your browser for every domain and every script calls with NoScript seems a tedious and long work. It varies to whom it's worth it. If it's not you then YesScript2 might work for you better.

One of the main priorities when writing this extension was to create a small code set so it can be audited much easier making it more trustful. The less lines of code, the more reliable and secure a solution can be.

I'd also like to express that I find the original YesScript extension a great idea and a nice work. This is a complete rewrite of it because the developer did not intend to continue development. This has nothing to do with the original in any way except its purpose.

Thank you.

User reviews
User reviews summary
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.
  • Useful in blocking unwanted scripts
  • Easy to use
  • Effective in blocking scripts
  • Gets rid of pesky scripts bits
  • Helpful on many sites
  • Blocks unnecessary ads and pop-ups
  • Fast page loading
  • Breaks other add-ons and websites
  • Blocks reCAPTCHA even in no-blocking mode
  • Issues with Content Security Policy on certain websites
  • Problems with hotmail after Firefox update
  • Toggle button not in URL bar
Most mentioned
  • Blocking scripts
  • Easy to use
  • Breaks other add-ons and websites
  • Blocks reCAPTCHA
  • Toggle button
Recent reviews
I find the YesScript2 add-on to be very useful in blocking scripts on websites that won't let you read without agreeing to a subscription or paying a fee. YesScript2 is extremely easy to use and very effective in blocking unwanted scripts. I love this add-on and I just wish it was available for my android cell phone. Thank you Andras!

Brokes both "To DeepL translation" add-on & website (, even in YesScript no-blocking state (grey). (DeepL states that it is not Internet Explorer compatible — while I am using Firefox — and advises to use Edge Browser instead). Also reported on the To DeepL translation add-on page.
by phma, 2023-03-08
View all user reviews
Risk impact

YesScript2 is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install YesScript2 if you trust the publisher.

Risk likelihood

YesScript2 is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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