User JavaScript and CSS

User JavaScript and CSS 2.1.1 CRX for Chrome

A Free Developer Tools Extension

Published By tenRabbits

User JavaScript and CSS (nbhcbdghjpllgmfilhnhkllmkecfmpld): User JavaScript and CSS on any website... Read More > or Download Now >

User JavaScript and CSS for Chrome

Download CRX


1.62 MB

Chrome Store

Tech Specs

  • • Type: Browser Extension
  • • Latest Version: 2.1.1
  • • Require: Chrome 80 and up
  • • Offline: No
  • • Developer: tenRabbits

User Reviews

  • 453 Votes, Average: 4.83 out of 5
  • • Rating Average
  • 4.83 out of 5
  • • Rating Users
  • 453

Download Count

  • • Total Downloads
  • 446
  • • Current Version Downloads
  • 13
  • • Updated: January 31, 2024

User JavaScript and CSS is a free Developer Tools Extension for Chrome. You could download the latest version crx file or old version crx files and install it.

More About User JavaScript and CSS

Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.

- Instant execution
- Custom libs include
- URL masking allows use one script or CSS on many pages

Change log:

Version 1.2.6
- Fixed error in console "Unchecked runtime.lastError: The message port closed before a response was received"
- Improved domain getter from URL
- Updated Ace Editor and jQuery to latest

Version 1.2.5
- Resolved bug with '@import' and "Auto-important css" feature
- "Auto-important css" feature now disabled by default
- Added feature to exclude URL's by '!' symbol at start
- Updated jQuery and Ace editor to last versions
- Other small fixes

Version 1.2.4
- Added manual cloud sync in testing mode
- Improved "auto-important css" feature
- Other small fixes

Version 1.2.1
- Fixed algorithm of "high priority CSS"

Version 1.2.0
- Added toggle button in site list
- Added documentation tab
- Added 'Vintage mode' option to Ace Editor
- Updated jQuery, Ace Editor to last versions
- Other small fixies

Version 1.1.5
- Returned old method injection and added option to toggle this. Alternative method has feature to avoid CORS issues, but has only DOM access to site (no JS context). Old and now primary method is injecting by tag on site bottom.
- Added scroll past end in editor

Version 1.1.2
- Minor bug fixes

Version 1.1.0
- Added new injection system that increased perfomance
- Added feature: few URLs in one rule (separate by commas)
- Added word wrap setting
- Added CSS auto !important option
- Minor changes

Version 1.0.2
- Hot fixes

Version 1.0.0
- Full redesign of extension
- Added more settings
- Added toggleable counter on extension icon

Version 0.98
- Fix bug that prevent create new rules
- Minor changes

Version 0.96
- Full redesign of extension interface
- 80% code of extension core has been rewritten
- New feature: change URL field and mask with "*" symbol (eg *
- Editor window opens in new tab in split layout
- Disabled autosave feature
- Configurable editor in settings
- New icon

Version 0.94
- Hotfix editor opening bug

Version 0.93
- Fixed a bug where JavaScript is not always inserted in a page
- Outdated processes are disabled

Version 0.92
- Code autosave work on all pages

Version 0.91
- Fix "" zone parse
- Other small fixes

Version 0.90
- Improve core
- Add feature to load own libraries

Beta test. If you find any problem or have a question contact me on email.

Download User JavaScript and CSS 2.1.1

More Extensions to Consider (Similar or Related)