The Mozilla Foundation this week rolled out fixes for the recently released updates to its Firefox Web browser and its Thunderbird e-mail client. The latest tweaks mark the second time in a little over a week that Mozilla has issued fixes for vulnerabilities found in the products. Firefox 1.0.6 is a stability update that restores API compatibility for extensions and Web applications that did not work in Firefox 1.0.5, Mozilla officials said.Mozilla is recommending that Firefox users upgrade to this latest version. Last week Mozilla released Firefox 1.0.5, a security and stability update to the browser. Version 1.0.5 fixed a list of vulnerabilities including code execution through shared function objects, XHTML node spoofing, Javascript prompt origin spoofing, and Content-generated event vulnerabilities.Version 1.0.6 of the Thunderbird e-mail client, also issued this week, is a stability update designed to fix extensions, such as Enigmail, which did not work in Thunderbird 1.0.5. The Enigmail extension allows users to access the authentication and encryption features provided by GnuPG. Enigmail can encrypt or sign mail, decrypt received mail, and import and export public keys.The Thunderbird 1.0.5 update also was released last week to correct security vulnerabilities and stability, according to Mozilla officials. Technology Industry