There is a feature in SLIMJET, which offers an option to not load background tabs at startup. In which tabs are shown in the tab strip but not loaded until you click on it. This feature is also available in FIREFOX also by default.
Chrome Version : 56.0.2924.87
I have read another post here saying
To actually disable:, type in your address bar: chrome://flags, then disable this flag: #automatic-tab-discarding (Turn it to 'Disabled' from 'Default')
But this thing is also not working in Chrome 56.0.2924.87
So please kindly enlighten me.