This add-on used to work great, but like many similar extensions, it hasn’t been keeping up with YouTube’s recent changes — hover previews are back to autoplaying non-stop for me.

Just switched to a brand-new userscript that’s only ~2 weeks old and already has flawless 5-star reviews:
→ Search GreasyFork for “YouTube - Block Autoplay Preview Thumbnail & Channel Trailer”
→ Install it with Tampermonkey or Violentmonkey (both available on Firefox too).

What I love about this script:
• 100% blocks thumbnail hover previews + channel trailers
• Updates come lightning-fast whenever YouTube breaks something
• Zero background permissions, way lighter than any extension
• Works perfectly on Firefox too

Made the switch a few days ago and my YouTube homepage finally feels peaceful again. If you’re annoyed by autoplaying thumbnails, this little script is currently the best fix out there — highly recommend giving it a shot! 🚀

Thank you! Auto adding videos I didn't watch to my history was driving me crazy!

As someone who dislikes previews (since YouTube adds that video to your watch history if you let it go for too long) this has been a must-have for me since YouTube keeps re-enabling previews in my settings.

Does exactly what it says it does. No more autoplaying previews. Nice and clean look, 10/10 extension