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Wikipedia list article
Augmented Browsing Software
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
Grammarly
Browser extension
Grammar, plagiarism and spell checker which can retrieve definitions and synonyms for marked words.
Firefox, Chromium (Chrome, Microsoft Edge, Yandex-Browser, Vivaldi, Opera, Cent Browser...), Safari, IE10+
2017
Greasekit
Provides userscripting for Safari (WebKit)
2008
Violentmonkey
Browser extension
Built with web extension APIs. It supports a lot of browsers.
Firefox , Chromium browser and Opera .
2020
Greasemonkey
Browser extension
Alters the output of web content immediately after being displayed
Firefox , Chromium browser and Opera .
2020
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 .
2020
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
2017