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Doesn't (Desktop) Firefox use it for history and bookmarks and various things as well[1]?

I wonder if 'delete my history' GUI action actually removes the file (securely) or just deletes entries from it, exposing it to this sort of recovery?

[1] The file location and sample query against places.sqlite from http://www.forensicswiki.org/wiki/Mozilla_Firefox#History works for me on OSX 10.9/FF37

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Firefox's Places subsystem does use SQLite. Firefox's built-in SQLite implementation is compiled with the SQLITE_SECURE_DELETE mechanism referenced elsewhere in this thread (https://dxr.mozilla.org/mozilla-central/source/db/sqlite3/sr...) and a configure check is performed when Firefox is built with system SQLite (https://dxr.mozilla.org/mozilla-central/source/configure.in#...).

Additionally, there's a unit test that verifies that the feature is really working at https://dxr.mozilla.org/mozilla-central/source/storage/test/... that checks that a string shows up in the database and then disappears from the database when the row is removed from the database.

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