That's unfortunate, but this is working as intended. The sandbox provided to strictly-confined snaps (including chromium) doesn't allow access to the system-wide /tmp, to prevent untrusted applications from stealing data from others.
This was discussed at length there: https://forum.snapcraft.io/t /sharing-files-via-tmp/1613. ** Changed in: chromium-browser (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1901065 Title: Chromium Browser (snap) Fails to Open Local Files from /tmp Directory Status in chromium-browser package in Ubuntu: Invalid Bug description: Ubuntu 20.04 Linux Zweiblum 5.4.0-51-generic #56-Ubuntu SMP Mon Oct 5 14:28:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux $ snap info chromium name: chromium summary: Chromium web browser, open-source version of Chrome publisher: Canonical✓ store-url: https://snapcraft.io/chromium contact: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bugs?field.tag=snap license: unset description: | An open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. commands: - chromium.chromedriver - chromium snap-id: XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R tracking: latest/stable refresh-date: gestern um 18:33 CEST channels: latest/stable: 86.0.4240.111 2020-10-21 (1362) 170MB - latest/candidate: 86.0.4240.111 2020-10-21 (1362) 170MB - latest/beta: 87.0.4280.20 2020-10-16 (1357) 172MB - latest/edge: 88.0.4292.2 2020-10-16 (1358) 173MB - installed: 86.0.4240.111 (1362) 170MB - I use a Java application which creates temporary HTML files in /tmp and then uses java.awt.Desktop.getDesktop().browse("file:/tmp/tempfile_xxxx.html") to display this file in the system's default browser. This worked fine till the upgrade from Ubuntu 18.04 to Ubuntu 20.04, where it broke completely. Chromium is my default browser, but does not see the system /tmp dir, but only the one belonging to the snap. So it just outputs an "file not found" message after correctly being invoked by xdg-open. :-( To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1901065/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
