It looks pretty good on my laptop, though the font doesn't quite look like a terminal's (especially the bold), but overall it's still pretty nice. It would be even better if some simple commands (like the most basic grep, less) could be added.

I have always blocked third-party cookies. The only problem I've encountered (there may be others, but I haven't come across them) is that some embedded videos on certain web pages won't play and prompt me to enable cookies.

Partly. Mostly I write it myself, and only ask the LLM when I encounter problems.