MDN Search 2025: Web & Extension Developers' Bible Autor: Handmade Internet Treasures

MDN (Mozilla Developer Network) empowers developers worldwide to build a better, open web.

Use @mdn to search on MDN (Mozilla Developer Network) directly from your search cum address bar.

Creating Ethical & Privacy-oriented Mozilla Firefox Add-ons. 100% hand coded software - so you are assured these add-ons will never, ever contain AI slop and will work reliably every time you use it. Now. Always.

Contribute liberally. Make a difference. We need your love and active support. Please participate in this mission at https://buymeacoffee.com/handmadeinternettreasures

Contribute liberally to encourage us and allow us to keep our lights on and focus on maintaining this Handmade Internet Treasure and create more Handmade Internet Treasures for you!

MDN is an open-source, collaborative project owned by Mozilla Corporation and developed by Mozilla, in partnership with a global community of volunteers and partners. MDN logo is owned by Mozilla Corporation.