Yes, You are right I meant CTRL+TAB... ( I could not find option to edit my post )

I am using Opera Developer 30.0.1812.0 ( on Linux Mint 17.1 ).

Incorrect icon not shown in the title bar in some window managers under Linux.

This happens on XFCE.

How to disable TAB preview ( thumbnails ) when pressing ALT+TAB ?

Can't find anything related to this in settings...

This bug is still present in: 30.0.1812.0 !

Please check my image:

http://i.imgur.com/J2XhTFB.png

Titles on Developer Tools tabs are cut off...

How to make them fully visible ?