After the second start Opera the start page crashed again.
Here output messages from terminal https://drive.google.com/file/d/0B_QLaHiJqY0-STl1VXRNT2NyenM/view?usp=sharing
Maybe it will be helpful.

It is very strange, but after I've rebooted computer the browser works again.

Just watch this hell
http://itmages.ru/image/view/2825814/8b04a6e7

It's my home page with bookmarks.

P.S. LinuxMint 17.2 x64 Cinnamon.

Thanks chenjohnliu!
It really works

Do you mean maximised or fullscreen (F11)?

I talked about maximised.

My distro is LinuxMint.
It is from wikipedia: From version 1.2 onward, Cinnamon uses Muffin, a fork of the GNOME 3 window manager Mutter, as its window manager.

It's not right idea to use third party software to make works Opera as it should by default.

Opera browser can't start syncing. There is an error - "Something went wrong".

Hi!
I came from Opera_12 to Opera_dev a few days ago. Everything is OK but I have annoying bug - everytime when Opera is opened it resets window size. Is there any way to fix this?
I want use Opera in fullscreen mode, but don't want everytime click the fullscreen button.

LinuxMint 17 x64, Opera_Dev 27.0.1670.0