Following the release of new versions of both Internet Explorer and Firefox, the infamous 'browser wars' are flaring up again. Despite both Firefox 1.5 and the Beta of IE7 making significant strides, it would be be foolish to think this was a two-horse race. While gaining a good reputation with geeks and power users, Opera has long been a bit-part player among the big boys of the browser world. However, if this preview release is anything to go by, the Norwegian-built browser could finally be ready to punch with the heavyweights.

Opera has been pioneering new ways of browsing the web for some time. It has had tabbed browsing since the days before tabbed browsing was cool and developed the innovative 'mouse gestures' control system, where you navigate through the web just by holding the mouse button and flicking your wrist. The developers even dabbled with a multi-pane interface for viewing several pages within one interface.

The good news is that Opera has lost none of its appetite for innovation, and version 9 is packed with new goodies that will have the programmers at Mozilla and Microsoft choking on their doughnuts. For starters the app runs much quicker than the previous release, making it arguably the quickest browser around (except perhaps for Safari) at rendering pages. Incredibly, despite this boost in performance, the program appears to use less memory than version 8.5, making it far less draining on system resources than Firefox and IE.

In terms of features Opera is the gift that keeps on giving. New to the program comes OSX Tiger-style 'widgets', allowing you to check news, convert currency, view the weather and so on through a series of draggable pop-ups which anchor themselves in front of the browser. Although there aren’t many widgets to choose from at present, this is sure to change once the tech-minded Opera fans start developing more.

Another great addition to Opera 9 is BitTorrent support, allowing you to download torrents directly within the browser – a feature that amazingly no one had thought of before. This system works very smoothly, which makes us wonder why RSS feed reading support in Opera is still so poor.

Among the other new treats within the program is a nifty new search feature which lets you add any search engine to the search bar in the main toolbar. This means you can instantly access searches within your favorite online destinations (Softonic, for instance).

Tabbed browsing remains, although some users may be annoyed to discover that Opera has added close tab buttons to the tabs themselves rather than as a separate button. Having said this, the new web page preview thumbnails that appear when you rollover a tab are a real masterstroke. Mouse gestures are still there too, along with the addition of Total Recall-style voice commands – another example of how cutting-edge this browser is.

Opera's developers have been keen to ramp up security features too, and although they aren't highly original, the new content blocking and pop-up blocking functions serve their purpose effectively. What's more, it's refreshing to see a browser that embraces the latest web standards so freely, with the latest release boasting support for CSS 2.1 and CSS 3 tags.

The browser is remarkably stable and is far better behaved than Internet Explorer 7. Combined with its speed, innovative features and standards support, Opera is undoubtedly web software's best-kept secret, and the final release may prove to be even better than Firefox. Don't say anything though, or everyone will want it.