- 8› = button for Opera since version 8 (including 9›)
- 8.x only = button for Opera from version 8 to version 8.54 only
- 8-9.25 = button for Opera from version 8 to version 9.25 only
- 9› = button for Opera since version 9
- 9› = button is new or changed
- 8732› = button for Opera preview/beta version since build 8732