Button to close all other tabs
Usually I opens many tabs and sometime close all other tabs except current tab by right-clicking, but it sometimes feel troublesom. So I hope Vivaldi will have a button to close all other opened tabs, and it is located to the left side of trash icon on the top bar!
You can leave your request here : Feature requests for 1.9 / 1.10
I personally do not see a need to have this button! It would leave the interface polluted, unless you have an option to hide that button in the settings.
I currently use keyboard shortcut to do this! Ctrl + down arrow.