Fixes for recent problems with extensions – Vivaldi Browser snapshot 1.15.1146.5
https://vivaldi.com/blog/snapshots/fixes-for-recent-problems-with-extensions/

Changelog
[Regression] Some extensions don’t react on mouse click (VB-38617)
[Regression] Tab back/forward history lost on drag and drop (VB-39001)
[Regression] Vivaldi tree not populated (VB-38229)
[Regression] Window is closed when closing last tab stack (VB-39120)
[Linux] Save password dialog does not show up (VB-38805)
[Mac]’Manage Bookmarks’ can be shown after bookmarks (VB-39155)
[Speed Dials] Pending thumbnail updates displayed incorrectly in status bar (VB-38918)
[Speed Dials] Tiled SD links open in wrong tile (VB-38891)
[Sync] Don’t display unknown sync status when not logged in (VB-39061)
Themes with rounded corners cut part of characters typed in search field (VB-38752)
Google Chat is not supported in Vivaldi (VB-39030)

cVimとAmazonアシスタント拡張の不具合修正入ってるっぽいね