What is "brotli"

Brotli is an open source data compression library developed by Jyrki Alakuijala and Zoltán Szabadka. Brotli is based on a modern variant of the LZ77 algorithm, Huffman coding and 2nd order context modeling.

It can be used to speed up browsing the Web in Chrome, Opera or Firefox. Like zopfli, another compression algorithm from Google, brotli is named after a Swiss bakery product, brötli.