I think the answer comes quite naturally:

• you have the common TLDs, like .fr, .com, .org that are generally well-known as you can see them in various places.

• the TLDs referring to French places (full name: .paris, or abbreviated: .bzh …), words (.capital, .credit, .boutique)

• more rarely those referencing to transparent words (from english to french): .deals, .love, .shopping, .discount, .design … but less natural, depending on the population

• the bonus one is when you manage to create a word containing the extension’s letters, like lava.bo, ran.do, ‘anti.be’, or sentence if you like to play j-aime-la.pizza, maybe this solution is harder to remember

(tested here: https://shop.gandi.net/fr/domain/suggest?search=test)