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+#------------------------------------------------------------------------------
+# $File: mozilla,v 1.12 2021/04/26 15:56:00 christos Exp $
+# mozilla: file(1) magic for Mozilla XUL fastload files
+# (XUL.mfasl and XPC.mfasl)
+# URL: https://www.mozilla.org/
+# From: Josh Triplett <josh@freedesktop.org>
+
+0 string XPCOM\nMozFASL\r\n\x1A Mozilla XUL fastload data
+# Probably the next magic line contains misspelled "mozLz40\0"
+0 string mozLz4a Mozilla lz4 compressed bookmark data
+# From: Joerg Jenderek
+# URL: https://lz4.github.io/lz4/
+# Reference: https://github.com/avih/dejsonlz4/archive/master.zip/
+# dejsonlz4-master\src\dejsonlz4.c
+# Note: mostly JSON compressed with a non-standard LZ4 header
+# can be unpacked by dejsonlz4 but not lz4 program.
+0 string mozLz40\0 Mozilla lz4 compressed data
+!:mime application/x-lz4+json
+# mozlz4 extension seems to be used for search/store, while jsonlz4 for bookmarks
+!:ext jsonlz4/mozlz4
+# decomp_size
+>8 ulelong x \b, originally %u bytes
+# lz4 data
+#>12 ubequad x \b, lz4 data %#16.16llx
+
+# From: Joerg Jenderek
+# URL: https://en.wikipedia.org/wiki/Firefox_4
+# Reference: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT
+# Note: Most ZIP utilities are able to extract such archives
+# maybe only partly or after some warnings. Example:
+# zip -FF omni.ja --out omni.zip
+4 string PK\001\002 Mozilla archive omni.ja
+!:mime application/x-zip
+!:ext ja
+# TODO:
+#>4 use zip-dir-entry