Recently Opera has ditched its Presto rendering engine and Adopted WebKit rendering engine for its browser. Opera has released Opera 15 which is powered by new rendering engine, it’s the same rendering engine which is also used by Google for Chrome.
Now the good part is that you can install Google Chrome extension on Opera web browser. To do that first you need to know the URL of any extension of Google Chrome, for this search for any extension and copy its URL, actually we need it ID not full URL so extract ID from URL and replace ##### in below mention URL with ID :-
And now load URL on Opera, It will throw a error just click on OK and navigate to your extension page on Opera, here you will see extension is now installed, just click on Install and that’s it, You have Chrome extension on Opera.