Tampermonkey Alternative Instant

AdGuard’s browser extension isn't just for blocking ads. It has a hidden userscript engine that supports most Tampermonkey APIs. The killer feature? It runs before the page loads. Tampermonkey waits for DOM readiness; AdGuard injects at the network level.

I switched to for daily driving. It feels like Tampermonkey from 2018—before the feature bloat, before the telemetry fears. But I keep ScriptCat in a portable Firefox install for those late-night automation experiments. tampermonkey alternative

Greasemonkey is the original. Created in 2005, it birthed the entire userscript ecosystem. But while Tampermonkey added bells and whistles, Greasemonkey stayed minimalist— too minimalist for some. AdGuard’s browser extension isn't just for blocking ads