Quitting with no notice?

Hey all, i’m a 28 YO, currently debating whether i should stay at my job after receiving a final warning from a company. This is my second ever written warning and was told it’s my final warning. I’ve also felt my managers behaviors towards me has changed a bit. I have been heavily considering quitting without notice before i get fired later down the line. Also important to mention i currently have a second job already. Please advise?