This article by editor Rhiannon is currently the top rated post on the site. I don't use Opera myself but if I did, I can see how valuable it would be to be able to use all those Chrome Extensions. Here's what Rhiannon had to say:

"If you love Opera but have wished there were more extensions, you'll be happy to hear that you can now use Chrome extensions in Opera. When Opera started using the same engine that powers Google Chrome a few versions back (I'm using version 33), it became possible for Chrome extensions to run on Opera. It's easy to install Chrome extensions on Opera, here's how: " Read More