This file is indexed.

/usr/lib/thunderbird/extensions/ is in thunderbird-l10n-ga-ie 1:52.8.0-1~deb8u1.

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

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