I am in the same situation as you are, by that i mean - not having a frenchie yet. But I think that it is better to be over-aware than non knowing important things that may save your dog’s life. Obviously there are some issues, such as IVDD or breathing problems that a frenchie owner faces more often than owners of other breeds, but still each breed has its own problem, to say - big dogs like German Shepherd or Labs have hip dysplasia a lot, basset hounds suffer from ear infections, smaller doggies have all sort of anxieties etc.
Why am I saying it? Because if you care and try to stay aware - you will make a great pet owner, whether it is frenchie or any other breed. And the joy of owning a frog-dog, from what i heard, is worth all the trouble in the world!