It's always the same story with UX change. Everyone hates it, barely anyone is able to look past the period of getting used to it.

The number of people who actually run Pale Moon on Windows XP themed machines today, is extremely limited. Back in the day, people were furious about Australia.

You're not, I like it too.

The aspect ratio of the thumbnails is closer to the aspect ratio of the screen, which makes sense to me.

Also until you reopen each tab, you don't get a mini screenshot of it. I like the mini screenshots so I can see what the page was without having to read its title.