Here are some highlights…
New spam blocking tool
Swipe to change tab now works on whole page
This was changed to better support Android 10 gestures. The old "swipe from edge" gestures are still available but disabled by default.
New customisation options
"Open links in external apps" (disabled by default), "Custom CSS" per site, "Custom JS" per site, "Download images only over WiFi", and additionl font settings have been added.
Offline read later pages
When selecting links/pages to read later, they can now be saved for offline viewing.
New history view
Page history is now grouped by website and history from a particular website can easily be viewed and deleted.