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Unlike other preview systems, such as the “binoculars” tool at, which fetches small thumbnails of the new pages, Browster window displays the entire page at full size, just as it would appear if a user clicked to it. And moving the mouse outside the Browster window makes it disappear. In short, it spares the user the need to click back through a browsing history to recover an earlier page.

At first, Browster was intended as a way for users to quickly preview the results from search engines such as Google or Yahoo. And it’s still quickest when used that way: on search pages, the software pre-fetches the pages for every result and inserts a Browster icon next to each one, indicating that it’s been loaded into the browser’s cache. That way, the pages pop up instantly when a user mouses over the search link, explains Milener, now Browster’s CEO.

But after Milener and Brown (who is Browster’s chairman) rolled out the first version of the tool in 2005, they discovered something surprising. “Users loved the ‘hover’ icon, and they use it even more than the ‘pre-fetch’ icon on Google,” Milener says. “They’re using Browster all over the Web, just to preview pages – even though those pages are loading at the same speed they would if just clicked. In other words, the navigation function turned out to be more valuable than the pre-fetching. We realized this isn’t just a better way to preview search results – it’s really a fundamental switch in the way we navigate.”

While this change may not be completely revolutionary, it’s one of the first in a very long time. “When you look at Microsoft in the mid-90s, you have to conclude that they stifled innovation in the browser market,” says Flock’s Andrews. “They stopped Netscape in its tracks with Internet Explorer, and once they became the dominant player in browsers, they just sat on it. But now that we have the core technology that anyone can use to create a browser – the Mozilla code base, which has really come of age with Firefox – I think we’re going to see a lot of innovation.”

Flock’s developers hope to demonstrate that the Mozilla code base can be used to build a browser that’s even more versatile than Firefox, which is famous for its ability to run extensions, such as Browster’s. For example, Flock lets users upload files such as photographs to the Web by simply dragging and dropping them into the browser window. It notifies users when their friends have posted new pictures and shows the pictures directly in an area called the “photobar.” It also has a built-in feed reader, blog editor, and integrated desktop and Web search tool, as well as an enhanced “favorites” system that lets users tag and share their bookmarks.

Features like these are already available to users in the form of standalone services or Firefox plugins, but Flock’s developers believe that integrating them will provide a better user experience. “We’re building the next-generation web browser,” says Andrews. “We’re going to exceed what people are used to with Internet Explorer and Firefox right now, by integrating these services and reducing the complexity of simple tasks, say, uploading photos to Flickr or adding images to your MySpace page.”

Web users won’t have to wait long to test Flock’s theories; Andrews says a beta version will be launched “in the next few weeks.”

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