TabDB is an in-browser database that allows users to use their browser tabs as storage. By running SQL queries, data from neighboring tabs’ titles is collected, concatenated, unzipped, and loaded into an in-memory sqlite database. The command is then executed, and the database state is dumped to a string, zipped up, and spread across available tabs. The website tabdb.io offers a live demonstration of this concept. The code for TabDB is admittedly awful, with a mishmash of global variables, commented-out code, and TODO comments. The author acknowledges that if this were production code, they would deserve to be criticized. However, as a fun one-off project, they hope not to be judged too harshly.
https://github.com/kkuchta/tabdb