With Chrome moving to Manifest V3, extensions have stricter limitations on remote code execution. Tampermonkey and Violentmonkey have both adapted by utilizing specific sandboxing permissions. However, because Tampermonkey is closed source, security auditors cannot verify exactly how it handles user data. Violentmonkey’s code is auditable on GitHub.
Apple integrated a userscript manager directly into the browser engine.
Privacy nerds who read every git diff before updating. tampermonkey alternative
Open Source | Platforms: Firefox Only
Some alternatives are lighter on system resources. 1. Violentmonkey - The Best Open-Source Alternative With Chrome moving to Manifest V3, extensions have
| Extension | Browser Support | Features | | --- | --- | --- | | Tampermonkey | Chrome, Edge, Safari, Opera, Firefox | Robust userscript management, script editor, debugging tools | | Greasemonkey | Firefox, Chrome | Simple userscript management, compatible with most scripts | | Userscripts | Chrome, Opera | Lightweight, easy to use, compatible with most scripts | | Violentmonkey | Chrome, Firefox, Edge | Similar to Tampermonkey, robust userscript management | | NinjaKit | Safari | Simple userscript management, designed specifically for Safari |
Whether you are looking for better performance, stricter privacy controls, or simply a free, open-source alternative, this guide covers the best userscript managers available today. Why Look for a Tampermonkey Alternative? Violentmonkey’s code is auditable on GitHub
"I have nothing to hide because you can read my source code."
Tampermonkey had been my loyal companion for years. It injected life into boring web apps, scraped data that wasn't meant to be scraped, and turned Reddit into a usable website. But lately, something felt… off. The extension grew heavier. The sync features demanded Google Drive or OneDrive access. And the Chrome Web Store reviews whispered of "telemetry" and "tracking domains."