It's good, I do wish that there was a refresh button for the link preview though. I had to close the link preview and then reopen it to see the changes like new comments being made on a thread/video. Additionally, it would be great if all the link previews I open up remembers where I last positioned it across the screen without moving back to its default side. Another QoL idea you could add to this is the function to copy the link preview's url.

Work well and great,
but the downside is I using dark mode in my Firefox,
even have "Dynamic theme" setting,
it still have a white screen when start open mini window