/usr/share/lightning/extensions/langpack-pa-in@lightning.debian.org/chrome.manifest is in lightning-l10n-pa-in 1:52.8.0-1~deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | locale calendar pa-IN jar:chrome/pa-IN.jar!/locale/pa-IN/calendar/
locale lightning pa-IN jar:chrome/pa-IN.jar!/locale/pa-IN/lightning/
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