For Opera, try this UserScript.
I personally use Opera too, and a Windows freeware called HandyCache to handle redirections, adblocking, proxy forwarding etc. (its site is in Russian but you can change the interface to English and other languages after downloading... if you are interested I can teach you how to use it). Some examples of redirections I've created are one for accessing the mobile version of Blogspot blogs automatically and another one for opening just the pictures instead of complete imgur pages. Again, all that is possible with Firefox extensions as well.