"/usr/lib/chromium-browser/extensions" isn't created by any package, as far as I can tell.
Does this directory contain anything on your system? Does the following command reveal anything interesting? dpkg -S /usr/lib/chromium-browser/extensions ** Changed in: chromium-browser (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1832094 Title: Error on login due to wrong permissions on /usr/lib/chromium- browser/extensions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1832094/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs