Mozilla SeaMonkey:Official project website with information and downloads.
Blogzilla: A weblog covering news, tips and hacks.
edafe Mozilla: Help and information about how to perform common functions in Mozilla.
Gemal.dk - Mozilla: Provides some links to articles about Mozilla and information about building and testing Mozilla.
Getting Involved with Mozilla: Help and suggestions for those that want to help out with the massive project, but don't know where or how to start.
GreyMagic Security Advisory: Reading Local Files in Netscape 6 and Mozilla: Describes how Mozilla's version of XMLHTTP, the XMLHttpRequest object, allows reading of arbitrary local files. Includes a demonstration of the exploit. (No longer an active bug in new versions of Mozilla)
Gunnar's Mozilla Help Site: Offers help for and information on Mozilla with a FAQ section as well as image-heavy How-Tos about installing and configuring Mozilla browsers.
Hidden Mozilla Prefs: Description of some hidden prefs to customize Mozilla, also has information on customizations to the UI and content display.
Keyboard Help for Mozilla: List of keyboard shortcuts.
MozBackup: A freeware Windows utility for backing up Firefox, Thunderbird and Suite user data.
mozdev.org: Center for development projects based on the open source Mozilla project.
Mozilla Bookmarks: Large list of links covering development, customization, add-ons, FAQs and tips & tricks.
Mozilla Europe: The official home of Mozilla Europe. Contains mozilla information and news.
Mozilla Icon Packs: A collection of icons packs for Firefox and Mozilla browsers.
Mozilla Preferences list: An extensive list of Mozilla User Preferences.
Mozilla.org: Bugzilla: The Mozilla bug database. Search for reported bugs, and report new ones for the Mozilla browser suite and its associated components.
Mozilla.org: Mozilla and XML: About Mozilla's support for XML.
Mozilla.org: Mozilla Localization Project: All efforts to create local versions of Mozilla
Mozilla.org: NGLayout Project: Mozilla's new high performance standards-based layout engine, also known as "Gecko".
Mozilla.org: Projects: All the ongoing projects at mozilla.org.
Mozilla.org: RDF in Mozilla: An overview of the use of RDF in the Mozilla web browser.
Mozilla.org: Weekly Status Update: Status updates and overview of what's happening in the whole Mozilla project.
MozTips: Tips and Tricks for Mozilla.
Squarefree Bookmarklets: Javascript add-ons that add features to the browser, such as Zoom Images and Search Links.
Technology Evangelism: Devoted to helping promote, coordinate, and support the Mozilla Evangelism effort.