A great way for downloading French subtitles is through http://www.vostfr.club/. It is a website specifically developed for downloading sous-titres français. Next time you want to watch a movie or TV series with French subtitles, try it out with this website.
vostfr.club has around 43,314 movie subtitles and around 68,094 TV series subtitles. This uses opensubtitles.org as a base database for the subtitles. The details of every movie and TV series are also provided. It uses www.themoviedb.org for the images, and the information is taken from www.themoviedb.org & www.imdb.com. The details of the TV series are taken from www.tvrage.com. This basically makes the website a complete package for French subtitles.
You can just enter your search text in the main page search box.
Now, the details like the release date, IMDB ID, language, duration, genre, etc. will be displayed for your search item.
You can find all the French subtitles available for the movie/TV series at the bottom of the page.
You can choose the subtitles file and download it.
You can also browse through all the movies and TV series available in the site. The sous-titres for all these will be available along with the details. Go ahead and visit this website!