Opera, the longtime underdog browser favorite, released a rough alpha version of its next-generation browser today.
Opera 11 alpha for Windows, Mac, and Linux is notable at this point for bringing extensions to the closed-source browser, a feature not in earlier versions of Opera that has been a key selling point for Google Chrome. Extensions, which add extra functions to browsers, have recently come to Apple Safari, too.
Given that Opera has long offered a synchronization service called Opera Link, it wouldn't be surprising to see Opera 11 incorporate extension synchronization before the upgrade is finished. Another new feature in Opera 11 is a new open API for Opera Link that has been provided to developers to further the uses of the synchronization service.
Opera promised in a press release that the company will check all extensions to ensure that malware and defects don't creep in. This is a similar claim to those made by other browser publishers that support add-ons, although there has been malware that occasionally slips through.