The Mozilla Foundation has released an updated version of Firefox following the discovery of multiple security vulnerabilities involving the popular browser software.

The flaws create a means for hackers to conduct cross-site scripting or to otherwise seize control of vulnerable systems.

Many of the bugs involved the handling of JavaScript code while others involve memory corruption errors, as explained in a run-down by security notification firm Secunia here, that contains links to the relevant Mozilla Foundation advisories.

Firefox fans are urged to upgrade to version 1.5.0.5 of the browser software in order to guard against security attacks.

A related set of vulnerabilities - along with a security bug involving the processing of vCard attachments - mean Thunderbird email client and Mozilla SeaMonkey application suite users also need to upgrade to version 1.5.0.5 and version 1.0.3 of these software packages, respectively, as explained here and here. ®