A sidebar for a website, where you can add any website, including chatgpt, poe, perplexity, etc, but also basically any website - some thing like new AI Sidebar in firefox.
I would use it to open chatgpt or perplexity side by side with my current tab to get context of open website and to quickly get summary, or any question from AI chat. This could be used to open other apps, like youtube, redit or twitter, etc.