Description
Qt WebEngine on Linux in 5.7 prints a warning by default
[0608/104049:ERROR:browser_main_loop.cc(217)] Running without the SUID sandbox! See https://chromium.googlesource.com/chromium/src/+/master/docs/linux_suid_sandbox_development.md
The ERROR is misleading, since this is 'just' a warning. Anyhow, we also do not tell the user in the documentation what to do to enable sandboxing.
Finally, the mentioned file links to https://bugs.chromium.org/p/chromium/issues/detail?id=598454 , which says that the warning should be removed.