You Do Need power plug adapter while traveling from Indonesia to French Guiana.

Here is Why You Need An Adapter

The outlet and plug type used in French Guiana are C, D and E and in Indonesia are C and F. This is how they look like.

Indonesia

In Indonesia, outlets of type C and F are in use.

Type C

Type F

French Guiana

In French Guiana, outlets of type C, D and E are in use.

Type C

Type D

Type E