Based on Mozac 139 and GeckoView 139

SmartCookieWeb Preview 29.0

+ Updated GeckoView version
+ Toolbar theme now updates correctly when switching to a private/normal mode tab
+ Toolbar position setting now takes effect without restarting app
+ App theme setting now takes effect without restarting app
+ Fixed status bar icon colour when search dialog is open
+ Fixed find in page not collapsing toolbar
+ Fixed add-on installation confirmation appearing twice
+ Fixed add-on page crash
+ Fixed closing tabs with drawers swapped