You.com Omnibox by Adam Lui

Type @you in address bar to get results from You.com AI

Open source code: https://github.com/adamlui/you.com-omnibox
Support: https://support.youomnibox.com

Related add-ons:

Brave Omnibox
Type @brave in address bar to get results from Brave AI
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Phind Omnibox
Type @phind in address bar to get results from Phind AI
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More AI add-ons:

https://www.aiwebextensions.com