Matti Myllikoski draws my attention to this:
Bibliothèque nationale de France
It has an excellent collection of texts printed in French including various old books that are very useful for the study of the history of Biblical scholarship including Pierre Bayle, Richard Simon, Jean le Clerc and Voltaire. The texts are produced in photographic reproduction in PDF files which one views a page at a time. The key part of the web site for the digital texts is:
Gallica: la bibliothèque numérique
From there go to "Recherche" and you can search on key texts.