That's not how extradition works, ever. Yes, many countries have extra protections against extraditing their own citizens, but those only apply while those citizens reside there.

Otherwise there would be a booming naturalization business for some less-scrupulous nations.

In France it often does, and in other country's too, like a trade...China and the US trade allot of "bad boys".

>some less-scrupulous nations

Like the US, where you can buy your "out of prison" Card?

Do you have an example of country A asking France for permission before extraditing a French citizen who was not wanted for crimes in France to country B?

It's written in German, a bit different and even more complex:

https://www.swissinfo.ch/ger/auslieferungs-gesuch/2803478

Argentina asked Switzerland to extradite Jean Bernard Lasnaud for smuggling Weapons to Ecuador and Croatia (he's French), and why Argentinia? Because the former President Carlos Menem and other Politicians where involved in it.

As an example, France would ask A if he can extradited to France and prosecuted there, even when let's say the crime was in Country B. The US did something like that with Otto Warmbier:

https://en.wikipedia.org/wiki/Otto_Warmbier

That whole thing is often not National or International Law but Diplomatic (especially with someone like Assange)

> Argentina asked Switzerland to extradite Jean Bernard Lasnaud

That's Argentina asking Switzerland to extradite a French citizen to Argentina for crimes committed under Argentinian law. The article does not say that France was asked for their opinion or permission.

> https://en.wikipedia.org/wiki/Otto_Warmbier

That's the US asking North Korea to release a US citizen jailed there for a crime against North Korean law. Extradition does not enter the picture at all.

As an Aussie, sadly our politicians are a bunch of cowards.

Far cry from just years ago: https://www.youtube.com/watch?v=TYbY45rHj8w