4.0-rc1 error console/logs when app won't start?

[rbo...@gmail.com]

TLDNR: `grep "<app that won't start>" /var/log/* | less` has no info, where else should I look?

What I did:
- installed the latest chrome in the template for sys-fedora25
> In sys-firewall itself, that made Chrome show up in Settings > Applications, so:
- I pushed it over
> Now a menu item for Chrome shows up, sys-firewall:Google Chrome
- When I select sys-firewall > sys-firewall:Google Chrome, nothing happens
- sys-firewall:Firefox still works fine

Where can I look to see what errors are causing Google Chrome to not launch?

I'm using:
- 4.0-rc1
- Librem 13 version 2
- fedora25

TMIA, |r:b: