Oh and I am on newest Opera 37.

Hello,
I would like to ask why is my opera changing before my eyes without doing anything. A week ago I noticed that there are white frames around each link I find on google and google itself is slightly gray.
It wasn't bothering me so I ignored it, but today I went to youtube and those icons on the right side of your currently playing video (suggesting related videos) are so huge, that to see all videos on the list you have to scroll down like crazy and this is pretty irritating. I have tried other browser and all of them got google in pure white and size of those video icons on youtube as usual.

I tried to switch my theme in order to fix those white rectangles, but now funny thing happened because I turned my white opera theme to another one and when I saw that it did not change anything, I went back to opera white, which mysteriously became gray. When I go to the speed dial it is not white anymore it is gray.

Anyone got any ideas what is going on with my browser? Is it happening to you as well? Thank you for your replies.