Tampermonkey/tampermonkey
Tampermonkey is the most popular userscript manager, with over 10 million users. It's available for Chrome, Microsoft Edge, Safari, Opera Next, and Firefox. observed · 2026-08-28
Health v2 · maintenance only
39/100
- Activity 14
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4188
- days_rel: n/a
- days_push: 521
- n_releases_24m: 0
Adoption not part of the score
5692 stars · 561 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Tampermonkey is the most popular userscript manager, available as a browser extension for Chrome, Edge, Safari, Opera, and Firefox. It lets users install, manage, edit, and sync userscripts that customize web page behavior, supporting Greasemonkey-compatible metadata and GM_* APIs.
Use cases
- manage and edit userscripts in the browser
- enable or disable userscripts with two clicks
- sync userscripts between browser instances
- customize website appearance and behavior with scripts
- find userscripts matching the current page URL
- run Greasemonkey-style scripts with GM_* API support
When to choose
- you want to run or manage userscripts across Chrome, Edge, Firefox, Safari, or Opera
- you need full unsafeWindow access and GM_* function support
- you want to sync scripts between multiple browser instances
When to avoid
- you need the source code of recent versions - new versions are proprietary, only up to 2.9 is GPL open source
- you want a server-side or Node.js scripting tool rather than a browser extension
- you need Manifest V1 support for very old Chromium versions without using the legacy build
Facets
plugin · maturity active
developer-tools plugin-system workflow-automation web-scraping browser-extensions developer-tools web-development browser browser-extension cross-platform userscript-manager greasemonkey-compatible browser-extension script-injection gm-functions automation
1 source
- readme: https://github.com/Tampermonkey/tampermonkey · fetched 2026-08-28 · 3456f4680aa4
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| Tampermonkey/tampermonkey | main | 39 |
For agents
markdown · JSON · MCP: product_card(name="Tampermonkey/tampermonkey")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem