On our first floor we installed 2 inch door latches on the window frame for security. Works as a window stop and no one can lift our windows higher than the latch. Yet we just retract it if we want to open the window all the way.
Window security bars are an effective way of even preventing the burglar from breaking in to your home. One look at those well-built window security bars and the burglar will move along to the next house which is easier to enter.