Some sources are divided about this, but while French agricultural output did grow rapidly during the 19th century (far more than enough to cover the growing population), it grew somewhat more slowly than it could have because enclosure was not wholesale embraced (enclosure is often cited as one of the major causes of the British Agricultural Revolution). One of the chief reasons was the French Revolutoin
"Whereas the prophets of agronomy expected the impending political revolution to usher in the whole battery of agricultural innovations which they had been advocating for decades, ordinary country dwellers were broadly hostile to the emanations of physiocracy and agronomy save where they touched on the issues of taxation and seigneurialism. They were hostile, that is, to the freeing of the grain trade, to new crops, to the restriction of grazing rights in field, meadow and forest, and to enclosures. Without exception the cahiers of the builliuge of Bigorre called for the resumption of the droit de parcours with villages in the Beam, while in the Lorraine over two hundred parish cuhiers were moved to condemn the edict of enclosure. This was the reality contained within Georges Lefebvre’s apt description of the peasants’ revolution as at once revolutionary and conservative: “they brought down the feudal regime, but they consolidated the agrarian structure of France." - P. M. Jones , Agricultural modernization and the French Revolution
So in a scenario where this is avoided you would presumably see large scale agrarian capitalist farms rather than small-scale family farms.
According to a few sources, the Napoléonic wars and Continental System did quite a lot of harm to French port cities like Marseille and very likely retarded their growth, so we could see significantly larger/more economically important French port cities.
"The Continental System led toeconomic recessions in many port towns such as Marseille"
https://www.academia.edu/5022729/As...he_Continental_System_for_France_and_Napoleon
"Harbors were deserted, grass was growing in the streets, and in large towns like Amsterdam, Bordeaux, and Marseille, population did actually decrease. However the collapse of industrial production in the ports and in their hinterland has not been as much noticed. It resulted from the loss of overseas markets and to a lesser degree from the difficulty in obtaining raw materials. In Marseille, the value of industrial output fell from 50 million francs in 1789 to 12 in 1813"
https://www.jstor.org/stable/2115762?read-now=1&seq=5#page_scan_tab_contents