The biobar project is a bioinformatics power-browsing toolbar for Mozilla-based browsers including Firefox and Netscape 7+. This toolbar provides access to all major biological data resources. The primary advantage of this tool is that it allows a biologist to browse and retrieve data from Genomic, Proteomic, Functional, Literature, Taxonomic, Structural, Plant and Animal-specific databases. In addition to the browsing features, biobar also provides links to important bioinformatics sites and services including services at the European Bioinformatics Institute (EBI), National Center for Biotechnology Information (NCBI) and DNA Data Bank of Japan (DDBJ). The tool also provides links to major data deposition sites for nucleotide, protein and 3D-structure data. Finally, the menu also contains links to many Sequence, Structure alignment and analysis tools. The latest release (Version 1.3) of biobar provides browsing access to 38 different biological databases (listed here) as well as a significant improvement over the previous versions (See below). With this version, it is possible to customize one's own search databases, and terms. http://biobar.mozdev.org/