dejsonlz4

Decompress Mozilla Firefox bookmarks backup files

Current Firefox bookmarks backup files are stored as non-standard file format
based on lz4 compression. These files have a .jsonlz4 extension. Use
dejsonlz4 to decompress them.

lz4.c and lz4.h at this repository are verbatim copies from the Mozilla
repository as of 2016-05-12 (as currently used by Firefox) [1].

Usage:

Usage: dejsonlz4 [-h] IN_FILE [OUT_FILE]
   -h  Display this help and exit.
Decompress Mozilla bookmarks backup file IN_FILE to OUT_FILE.
If OUT_FILE is '-' or missing, decompress to standard output.

Build:

• gcc -Wall -o dejsonlz4 dejsonlz4.c lz4.c

Windows note:

• dejsonlz4 on Windows does not support unicode path/file names at this time.

References:

• Project page and source files: https://github.com/avih/dejsonlz4
• Releases and binary builds for Windows: https://github.com/avih/dejsonlz4/releases

External resources:

• Mozilla Firefox
  bug 818587 - Compress
  bookmark backups.
• Mozilla Firefox
  bug 1209390 - Use
  standard lz4 file format instead of the non-standard jsonlz4/mozlz4.

[1] Mozilla's mercurial repo rev. c3f5e6079284:
lz4.h
and lz4.c