You mean the ones where they essentially wiped out and replaced the locals, like the US, Canada or Australia? Or the ones where the locals are majority, like India, Bangladeh, Pakistan...
Not sure that the comparison is all that favorable with France. You check Algeria and Egypt, or Uganda and Niger, and it's not exactly a massive spread. The most positive comparison would be with Italian and Belgian colonialism, which managed to be incompetent and (even by colonial standards) gruesome, respectively.
Namibia and Tanzania turned out alright. They were something of money sinks, and despite the genocides performed by the Germans, they never really figured out how to turn a profit from their colonies. A bit late to the game, one suspects.