| Name
|
Form
|
Features
|
Compatibility
|
Last Updated
|
| bookmarklets
|
JavaScript
|
Can execute arbitrary JavaScript on any page, but requires a user to click them, rather than running automatically
|
|
Always working
|
| Firebug
|
Firefox extension for developers
|
Allows arbitrary real time changes to a page's DOM
|
|
2017
|
| Greasekit
|
|
Provides userscripting for Safari (WebKit)
|
|
2008
|
| Greasemonkey
|
Browser extension
|
Alters the output of web content immediately after being displayed
|
Firefox, Chromium browser and Opera.
|
2021
|
| Tampermonkey
|
Browser extension
|
Userscripts manager that provides features like a clear overview over the running scripts, a built-in editor, ZIP-based import and export, automatic update checks, and browser- and cloud storage-based synchronization
|
Firefox, Chromium browser and Opera.
|
2022
|
| iMacros
|
Firefox, Chromium browser, and Internet Explorer extension
|
Allows the user to record and replay "Internet Macros" for web automation, web scraping, or web testing.
|
|
2018
|
| Proxomitron
|
Proxy-level language
|
Available since late 1990s, predates JavaScript active browsing and provides a similar function for all browsers using a regular expression-like matching language
|
|
2003
|
| Stylish
|
Firefox extension using Cascading Style Sheets
|
Client-side manipulation of webpage content
|
|
2022
|
| Violentmonkey
|
Browser extension
|
open source alternative to Greasemonkey
|
|
2024
|
