It's great seeing Mozilla experiment with AI. AI can be really useful and here's some applications where I think AI can be really useful.
1. Automatic bookmarks organization and tagging. This is useful because some of us are not wired to think in an organized manner constantly, we often just add a bookmark to random places with the intention of "sorting everything later". And eventually, when you have hundreds or thousands of bookmarks it's already too late to do that manually if you ever decided organize.
2. The other suggestion is simple, TTS. Mozilla might be able to make use of existing projects such as Piper TTS which is free and open source and lightweight. So Mozilla can focus on integration and interactivity within the browser and let the actual voice be generated by Piper which would be installed on the system.
Thank you for this amazing browser.