This file is indexed.

/usr/lib/thunderbird/ is in thunderbird-l10n-ru 1:45.8.0-3~deb8u1.

This file is owned by root:root, with mode 0o755.

File Mime Type Owner Mode Size
..
/usr/lib/thunderbird/extensions/ root:root 0o755
/usr/lib/thunderbird/extensions/langpack-ru@thunderbird.mozilla.org.xpi root:root 0o777