Mozilla releases third Firefox 3 beta

Improvements, according to the Firefox 3 release notes, include a better tool for seeing who owns a Web site; better protection against sites known to install viruses, spyware, or other malicious software; the plugging of 350 memory leaks that previously could waste more and more computer memory; the ability to locate downloaded files; a better tool to find and install plug-ins; and color management support, now enabled by default.

The new Firefox beta can be downloaded from the Mozilla Web site, including versions for Windows, Mac OS X, and Linux localized for several languages.

The new Firefox beta also adopts more of the native style of Mac OS X, Windows Vista, and Linux--the latter having been a point of some contention earlier given some technical difficulties. Also interesting from an interface standpoint and giving the beta a new look is the use of vector graphics for elements such as the back arrow and reload button.

I like Firefox 3's new location bar drop-down feature, in which Firefox presents various sites I've visited or bookmarked. For example, typing "can" retrieves a list that includes various Canon Web sites I've visited as well as Icanhascheezburger.com. (Alas, though, everyone's favorite LOLcats site seems to have a rendering problem with the new browser in the form of 10 "favorite" buttons.)

Beta 3 apparently improves the "frecency" formula that selects what to display in the drop-down list based on how frequently and recently you visited the sites. My only beef with the location bar drop-down so far is that it's a visually chaotic jumble of URLs, favicons, and titles in different fonts and colors.

Coincidentally, I was able to give the new Firefox 3 beta a short stress test, and it fared much better than its predecessor.

I found a misbehaving Flash ad Tuesday that made Firefox 2 chew up about 98 percent of my CPU power and thereby caused my system--especially Firefox--to slow to a crawl. Today, I found that same ad on another Web site while trying the Firefox 3 beta, and although it, too, maxed out my CPU, Firefox now was usable, though sluggish.

Firefox 3 sports a new add-on manager to find, add, disable, and uninstall plug-ins.