If you are looking for French historical news coverage prior to 1945, Gallica is a fantastic resource, although not always easy to search.
One way to make your search easier is to restrict your search to notable French newspapers covering your time of interest. An incomplete list of some titles is below. For coverage after 1995, refer to the main News tab on the French research guide. If you're researching a topic that needs news coverage from after WWII, but before 1995, wwe have many print options--contact Laura for help!
Gallica itself has a useful guide (including some contextual information, such as publishers or political leanings) on its Presse et Revues [Newspapers and Magazines] page that covers many of the titles below.
Note: As with any title available free on the Internet, access to contents listed below may change without warning.
These tutorials are from the BNF's Gallica help pages and blog. [En Français, bien sûr!]