Hi @pixk, I'm sorry to say that Opera will also stop supporting 10.7 and 10.8 in the near future. Opera 37 will probably be the last release to support them. There are simply not enough users of those operating systems (and the group is shrinking) for us to warrant the cost of maintaining Opera for these OSes.
On Safari (Mac) you use "Command + Click" to open a link in a new tab in the foreground, like you mentioned; in Opera you can use " Shift+Command+Click" for the same behaviour!
I'm trying out the Opera browser, but can't figure out how to get rid of these stupid tabs! When I click on a link it won't open a new window, and instead opens another one of these tabs. Drives me crazy, and makes the browser impossible to use. How do I get rid of the tabs????