@bilu2 That's one of Opera's special features that a lot of users like. Ctrl + tab and ctrl + shift + tab are tied to the "Cycle forward through tabs" and "Cycle backward through tabs" commands respectively. Opera has separate "Switch right through tabs" and "Switch left through tabs" tied to ctrl + pageDown and ctrl + pageUp respectively for what you would consider the normal way. Goto the URL opera://settings/keyboardShortcuts to see. You can actually edit the shortcuts tied to the commands if you want to fix things to your liking if you wanted to keep the "Cycle tabs in most recently used order" option on in settings.
