Jellyfin has a skip intro plugin that is easy to install and works great from my experience.

I could be mistaken but I’m fairly certain when you first launch Firefox it asks if you want to import your bookmarks from other browsers.

None of the other answers I’m seeing are the actual reasons you shouldn’t trust more specifically. The reason you shouldn’t trust them is because a few years ago they had a data breach. It was relatively small and wouldn’t have effected many if any people but the problem was they didn’t disclose it and tried to bury it. It wasn’t found out about until a few years later. That should tell you if they had a major data breach that did affect you they would try to hide that from you and you would never know unless a you were made aware through other means.

Source: https://www.techradar.com/news/whats-the-truth-about-the-nordvpn-breach-heres-what-we-now-know