Pontoon: Update French (fr) localization of Firefox Screenshots
Pontoon: Update French (fr) localization of Firefox Screenshots

Localization authors:
- Théo Chevalier <theo.chevalier11@gmail.com>

mozilla-services/pageshot,mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/pageshot,mozilla-services/screenshots,mozilla-services/pageshot