PluginStats
User JavaScript and CSS users statistics
By tenRabbits · Chrome Web Store · Developer Tools
User JavaScript and CSS on any website
User JavaScript and CSS has approximately 200,000 recorded users on Chrome Web Store.
It ranks #63 of 1,556 tracked Chrome Web Store listings by users.
It is rated 4.5 out of 5 from 662 ratings.
PluginStats has 2 daily observations since Oct 16, 2026; the latest is from Oct 17, 2026.
Rating: 4.50 / 5 from 662 ratings
About User JavaScript and CSS
User JavaScript and CSS on any website
Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.
Features: - Instant execution - Custom libs include - URL masking allows use one script or CSS on many pages
Documentation: https://tenrabbits.github.io/user-js-css-docs/
Change log: Version 3.1.0 - Starting from Chrome version 138, the method for allowing user scripts in the browser has changed - Fixed a bug where styles weren't removed when a rule was deleted - Fixed a bug where not all rules applied to the page were shown in the rules popup
Version 3.0.6 beta - `try catch` wrapper removed - CSS injection improved - added button to save converted URL
Version 3.0.5 beta - the mode of injection of styles into the DOM has been returned - minor fixes
Version 3.0.3 beta - modules are now in the same scope - CSS injection improvement - and other minor fixes
Version 3.0.2 beta - hotfix: fixed bug with registration and deletion of scripts - added feature to change start scripts before page loading - added feature to strictly read URL patterns
Version 3.0.1 beta - Improved CSS injection - Fix loading external modules when replacing storage
Version 3.0.0 beta - The extension has been moved to MV3 - Added option to inject scripts and styles in iframe - Added the feature of live CSS - Added the One Dark theme and a few other improvements
Version 2.0.0 - 90% of the code has been rewritten; - Improved UI; - Added SASS support; - Added Prettier formatter - Other minor improvements
Version 2.0.0 - 90% of the code has been rewritten; - Improved UI; - Added SASS support; - Added Prettier formatter - Other minor improvements
Version 1.2.8 - Added function for naming rules - Updated translations
Version 1.2.7 - Updated all extension libraries to current versions
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 <script> 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 *.expample.com) - 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 ".co.uk" 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.
Description from the Chrome Web Store listing.
Where User JavaScript and CSS sits in the listing
Each band is one page of 20. Users on a log scale. Placement is projected from users, so it can differ from the marketplace's own sort order. Hover a dot to see the listing.
Charts
Images: 30d · 1y · all time · 1600×900 dark
Adoption over time
7/30/90-day growth
Ranking history
Filled points are observed values; hollow points come from Internet Archive snapshots of the listing page. Dashed segments span periods with no observations — values between points are not interpolated.
Recent observations
Full history (2)Similar Chrome Web Store Developer Tools plugins
Data source
User counts are read from public Chrome Web Store listing pages. Google displays rounded user counts (and caps the display at 10,000,000+), so small changes may not be visible. Rating counts above 1,000 are rounded (e.g. 1.6K).
Listing: https://chromewebstore.google.com/detail/user-javascript-and-css/nbhcbdghjpllgmfilhnhkllmkecfmpld. First seen Oct 16, 2026; last successful collection Oct 17, 2026. See the methodology.