No, with electron you have a copy of chrome running per electron app you have running, with SSBs they just told your browser to spawn a special window and used your browser engine to power it and they told your browser to stay alive in the background as long as the window was open.
Notice when you pay with PayPal on some sites a new window pops up that has no URL bar or buttons at top, that is close to what a SSB was.
In fact Firefox itself is an SSB, the whole UI is a webpage rendered inside a window with no decorations.
Biting the hand that feeds IT
