The question: I got used to eating breakfast while driving in order to save time for going to work. A friend told me it was forbidden and that I could be fined. Is this true?
Service-public's response: No, the highway code does not specifically prohibit eating while driving. However, this should not prevent you from performing the maneuvers in good conditions.
Indeed, if not prohibited, eating while driving can lead to a lack of control of the vehicle. Article R. 412-6 of the highway code provides in particular that , police or gendarmerie forces may be required, if they detect dangerous behavior, to punish you with a lump sum fine of €35 (contravention of 2e class).
FYI
The same goes for searching the glove box or putting on makeup. But beware, the use of the telephone while driving is strictly forbidden and punished with a fine with points withdrawn.