Custom JavaScript for Websites 3

Run custom JavaScript on any website.

Custom JavaScript for Websites 3 - Chrome Extension

Custom JavaScript for Websites 3 is a Chrome extension that allows you to run custom JavaScript on any website. It provides a powerful tool for site debugging, information extraction, ad blocking, custom UI creation, and much more. With added features like Ace Editor and Draft auto save, it offers a seamless experience for injecting and managing custom JavaScript code.
Download
Install from Chrome Web Store

Extension stats

Manifest V2
Users: 986
-10
Rating: 2.80
(5)
0.45
Version: 3.4.10 (Last updated: 2022-01-17)
Creation date: 2022-01-16
Permissions:
  • storage
  • http://*/
  • https://*/
  • tabs
Size: 585.73K
Full description: See detailed description

Ranking

# 29,834 ▼ 20
Other rankings
Upgrade to see more rankings

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge

User reviews

Please update this one, too! 🙏
by Endre Varga, 2025-03-08
storage.sync kills it. useless. i miss 1st version and need it so bad :)
by Miraç, 2025-02-23
Extensão mais pratica e util para mim!
by PSF SEMG, 2024-08-13
View all user reviews

Extension safety

Risk impact

Custom JavaScript for Websites 3 requires some sensitive permissions that could impact your browser and data security. 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.
  • Critical ****** ****** ** ******* ***** ***** *** ** **** ** ***** **** ******** ****** *** ******** ********** * ******* ********
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Low ******* ****** ** *** ********* ********
Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of Custom JavaScript for Websites 3. Use it at your own risk.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Upgrade to see full risk analysis details