burnout426 has posted a reply to: You can now decorate your tabs with Emojis in Opera
@scsi111 Opera Developer was just updated to have a flag at the URL opera://flags to disable it.
Until Opera Stable gets that flag, you can disable it on the command-line. For example, you can right-click on your desktop, goto "New", choose "Shortcut", point it to opera.exe in the install folder, name the shortcut what you want and click finish. Then, you can right-click on the shortcut, goto "properties", switch to the "Shortcut" tab and add a space and --with-feature:tab-art=off to the end of the target field value. Then, when you start Opera with that shortcut, the feature will be disabled.
For example:
"C:\Users\yourusername\AppData\Local\Programs\Opera\opera.exe" --with-feature:tab-art=off