If you use the old Cold War definition, yes. Otherwise
However, as the Cold War ended with the dissolution of the Soviet Union in 1991, the definition largely shifted to instead refer to any country that boasts a well-functioning democratic system with little prospects of political risk, in addition to a strong rule of law, a capitalist economy with economic stability, and a high standard of living.
Israel confirmed first world…?
Yes, first world means “allied to the US” and has nothing to do with standard of living.
If you use the old Cold War definition, yes. Otherwise
No, but they are directly tied to the US.