Mozilla Messaging has release an emergency third update for Thunderbird 3.0 on all platforms. This release fixes an issue with mail folders for some users who updated to Thunderbird 3.0.2. Thunderbird 3.0 users should be prompted to update within the next 48-hours or can do so manually via Help >> Check For Updates… For information as to what’s new, see Thunderbird release notes Source: Mozilla Developers News

One of the most powerful features in Firefox is also one too few people know about: the ability to create and use more than one profile at the same time. Here’s how to streamline and reap the benefits of multiple browsing profiles. Instead of installing every single extension for every task into the same Firefox profile, why not separate them into separate profiles, organized by task? Think of Firefox like an Operating System for the web, and each profile as a separate application—one profile is used for basic web browsing, another for writing, another for web development, and so on….