lzma – compression based on (raw) LZMA is available in Opera 20, and in elinks via a compile-time option[8]

xz - LZMA2-based content compression, supported by a non-official Firefox patch;[12] and fully implemented in mget since 2013-12-31.[13]

New Year gimmick: added support for XZ Content-Encoding / Accept-Encoding compression type

LZMA Decompression (CONFIG_LZMA)

This makes ELinks decompress local *.lzma files. Also, ELinks sends "Accept-Encoding: lzma" in HTTP requests and decompresses any documents received in that format, but this encoding has not been registered at http://www.iana.org/assignments/http-parameters, so most servers probably won't use it.

To use this, first install LZMA Utils. Version 4.32.5 works; 4.42.2alpha also works and understands a newer LZMA file format. This version of ELinks does not support LZMA SDK from 7-Zip.