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Firefox forgets history after 30 days.

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AnonymousUser
AnonymousUser
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Firefox forgets history older than about 30 days despite it being set to remember for 365 days.

Firefox forgets history older than about 30 days despite it being set to remember for 365 days.

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cor-el
cor-el
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You can look at these prefs on the about:config page. http://kb.mozillazine.org/browser.history_expire_days (180) (also affects saved form data) http://kb.mozillazine.org/browser.history_expire_days_min (90) .......... http://kb.mozillazine.org/browser.history_expire_sites (40000) http://kb.mozillazine.org/browser.history_expire_visits (20000)

To open the about:config page, type about:config in the location (address) bar and press the Enter key, just like you type the url of a website to open a website. If you see a warning then you can confirm that you want to access that page.