I think Tatbarao might be trying to make an idle game or one of those games that relies on timers, like maybe those dragon breeding games? I'm not smart enough to know exactly how to do it, but if the game could store the real world time when a player leaves the tab, and then compare it to the time when they return, and then make changes based on that time difference, then it would kinda be like the game didn't pause.
Nah it's some kind of real time casino game. If it was an idle game it is possible to do what you're saying by comparing time and I would've suggested this.