/usr/share/lightning/extensions/langpack-nn-no@lightning.debian.org/chrome.manifest is in lightning-l10n-nn-no 1:52.9.1-1~deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | locale calendar nn-NO jar:chrome/nn-NO.jar!/locale/nn-NO/calendar/
locale lightning nn-NO jar:chrome/nn-NO.jar!/locale/nn-NO/lightning/
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