Performance based earn-out payments over the next three years could make this deal worth $155 million.

Opera Software today announced that it has acquired Skyfire Labs, a rival in the mobile browser space, in a deal that could be worth as much $155 million when all the checks are written. The Norwegian browser maker agreed to pay $50 million in cash and stocks upfront (including $8 million in cash on the Skyfire balance sheet), and will also make performance based earn-out payments over the next three years that could ultimately value the deal at $155 million.

Google's Chrome team has reason to break out the bottles of champagne and fling corks through the office, something Dwight Schrute would never approve of. Why the celebration? Well, according to StatCounter, Chrome managed to unseat Internet Explorer to become the world's most used browser for the first time for a full calendar month in May. But if that's the case, why are corks flying in Microsoft's office as well?

Optionally, the latest version of Opera Software's online browser, Opera 12 (just released in beta form) is Opera like you've never seen it before. That's because Opera 12, or "Wahoo" if going by its codename, supports themes in case you want to change what's already a redesigned interface. From Cookie Monster to a cat wearing sunglasses, there are a bunch of themes to choose from, or you can create your own.

You're not likely to get away with installing a new browser on a loved one's PC this holiday season and calling it a gift, but hey, if you want to give it a shot, Opera Software says "a new browser is a gift that keeps on giving all year round." It just so happens Opera 11.6 is no longer bearing a beta tag and is ready for prime time. Should you bother to give it a spin?