FireProtDB is a comprehensive, manually curated database of the protein stability data for single-point mutants. Proteins find their use in numerous biomedical and biotechnological applications. Naturally occurring proteins usually cannot withstand harsh industrial environments since they have evolved to function under mild conditions. Increasing protein stability is one of the key determinants of protein applicability. The predictive power of the current computational tools is compromised by the limited experimental data that would allow a rigorous training and testing.