With support for CSS3, the browser Opera, it was always not particularly thick.
But today, in pre-alpha version 10.5, Opera announces support for interesting and long-awaited CSS3 features, in particular, this is CSS3 Transitions and 2D Transform. True so far, this is still far from a working solution, and therefore, in order to see how this works in Opera, we use the prefix 
-o . Details 
on the linkAll this has become possible, not without the help of the Opera's Presto 2.5 engine.
')
And finally, the 
long-awaited support for CSS3 Backgrounds and Borders . And by the way, Opera is the first browser that allows you to use these charms without the prefix 
-moz or 
-webkitReading the news, reaching the word prefix -o , I thought, damn, another prefix, but for this (see paragraph above) - I am ready to forgive Opera for the new prefix and say, and for good reason, using CSS3 in my projects, I also wrote border-radius (besides -moz and -webkit )PS I posted this topic exactly in this blog, since Opera fans will still obviously write something to the Opera blog.