I have a touchscreen application optimised and running in a Chrome kiosk mode. It runs totally offline and due to some updates to Chrome breaking the application I\'ve had to lo
Other answers address the core question here, about modifying Chrome or running it a certain way, but I'll give an alternative...
We built an application used within the organisation that has similar characteristics - full screen, must work offline, some installations will be away from internet (can't get updates) etc. Two of chromes popups were annoying, namely "restore session?" and "chrome is out of date".
Those pop-ups make sense for a browser but our app is essentially not a browser any more.
Solution: build into an electron app. Kiosk mode and loads of other benefits (access to os, developers can show menu and dev tools etc). It also means you control when updates happen rather than Chrome auto updating, or trying to.
Electron worked great for us.