¿Is it possible to redirect downloads in old Firefox for Android?

As I told you, that link leads to useful and valuable information. However, I have not been able to apply the solution described there. To complete my gratitude for your attention, I show you the only result that it seems we can achieve by applying that formula. As you can see, at F68, the inclusion of the “Boolean” only offers switching between true or false. It does not allow us to write any address. Maybe something else needs to be changed for F68 to accept the command. But, ¿ what?…