greasemonkey/greasemonkey

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

2585 stars · 349 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Greasemonkey is a user script manager for Firefox that lets users install and manage small scripts which customize web page behavior. It provides a GM API (e.g., GM.xmlHttpRequest) and a built-in script editor for authoring user scripts.

Use cases

• customize how websites look and behave in firefox
• install and manage userscripts
• automate repetitive actions on web pages
• block annoyances or add features to sites
• write and edit userscripts with a built-in editor
• run userscripts on firefox for android

When to choose

• you use firefox and want to run userscripts to tweak websites
• you need the classic GM API and mature userscript ecosystem
• you want a built-in editor and automatic script updates

When to avoid

• you use Chrome or Edge and prefer a cross-browser manager like Tampermonkey
• you need a full browser extension rather than page-level scripts
• you want scripts that run outside the browser

Facets

plugin · maturity active

browser-extension developer-tools workflow-automation browser-extensions web-development developer-tools browser userscripts firefox-extension script-manager greasemonkey automation android

Member repositories

For agents

markdown · JSON · MCP: product_card(name="greasemonkey/greasemonkey")