/etc/gnome-vfs-2.0/modules/extra-modules.conf is in libgnomevfs2-extra 1:2.24.4-6.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #
# Module configuration file for the GNOME Virtual File System.
#
# Syntax:
#
# <method 1> <method 2> ... <method N> : <module>
#
bzip2: bzip2
ftp: ftp
http: http
dav: http
davs: http
https: http
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