The new browser version also improves stability and fixes a problem with clearing browser history, according to the release notes. Mozilla updated the corresponding version of its earlier browser to fix some of the same security problems by issuing Firefox 3.0.15.
The six vulnerabilities potentially could let remote attackers take over the computer by running their own software on the machine. For details, check the Firefox security site.
Meanwhile, Mozilla is on the brink of releasing the first beta of Firefox 3.6, a version that will add the Personas feature for a customizable look. Mozilla, trying to move to a faster Firefox release cycle, is debating whether to issue 3.6 as a minor release that arrives automatically or a major release that people must actively download.
Also Tuesday, Mozilla released SeaMonkey 2.0, which combines the Firefox browser and Thunderbird e-mail software into an all-in-one package. It uses Firefox 3.5.4.