This is SQLite 3.8.7.4 See http://www.sqlite.org/ for more info. We have a mozilla-specific Makefile.in in src/ (normally no Makefile.in there) that we use to build. To move to a new version: Copy the sqlite3.h and sqlite3.c files from the amalgamation of sqlite. Be sure to update SQLITE_VERSION accordingly in $(topsrcdir)/configure.in as well as the version number at the top of this file.