As suggested by user ajgringo619 on askubuntu, disconnecting the home interface would get you close to what you're after. However to my knowledge there's no way to selectively connect certain folders in the home directory, such as ~/Downloads.
Note that if you disconnect the home interface, you will need to tell chromium where to store downloaded files, by configuring this in chrome://settings/downloads. ** Changed in: chromium-browser (Ubuntu) Status: New => Triaged ** Changed in: chromium-browser (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1847092 Title: Sandboxing Chromium Snap without FireJail To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1847092/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs