According to Cookie 5, LegacyStorageTracker.db can be found on my computer in ~/Library/SafariTechnologyPreview/LocalStorage. When I navigate there in Finder I find
- LegacyStorageTracker.db
- LegacyStorageTracker.db-shm and
- LegacyStorageTracker.db-wal
and when I open them, BBEdit identifies them as SQLite files. It appears Apple is taking advantage of the cookie machanism built into browsers to provide services to Safari. I haven't tested this, but I suspect that even if you deleted the files in ~/Library/SafariTechnologyPreview/LocalStorage they would be recreated the next time you opened safari. From my experimentation it doesn't make any difference what settings I have in Cookie 5, LegacyStorageTracker.db appears as a cookie any time Safari or Safari TP is open and does not appear as a cookie when the browser is closed. Be that as it may, I have flagged LegacyStorageTracker.db as a "keeper" in Cookie 5.
