https://vivaldi.com/blog/vivaldi-1-9-plant-trees-as-you-browse/
Changelog from 1.8 to 1.9
New features
[Search Engines] Add Ecosia as a pre-installed search engine
[Notes] Implement sorting (VB-27313)
[Extensions] Allow changing placement of extension buttons on address bar
(VB-13275)
[History] Add 「Filter by Site」 to panel (VB-26799)
[Web Panels] Add 「Removed Web Panels」 to the context menu to access
previously removed web panels (VB-26157)
BUG修復的部分就不貼 有興趣的自己看連結吧