For how to take a full page screenshot with animation, I’d suggest Awesome Screenshot. It’s a browser extension that lets you capture full pages, and while it’s not perfect for animations, you can pair it with a screen recorder to capture the dynamic parts.
Another option is Monosnap—it’s lightweight and has a free version that works well for scrolling screenshots.
Another option is Monosnap—it’s lightweight and has a free version that works well for scrolling screenshots.