Browser.history expire visits

From MozillaZine Knowledge Base

The title given to this article is incorrect due to technical limitations. The correct title is browser.history_expire_visits.

This article describes the preference browser.history_expire_visits. To add, delete, or modify this preference, you will need to edit your configuration — do not edit this article.

1 Background
2 Possible values and their effects
3 Caveats
4 First checked in
5 Has an effect in
6 Related bugs
7 Related preferences

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Background

Mozilla keeps no more than a set number of entries in its browsing history. This helps performance by reducing the amount of information that must be kept in memory while the browser is running. This preference determined the maximum number of history entries the browser kept. It has since been renamed to browser.history_expire_sites, which behaves slightly differently.

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Possible values and their effects

A positive integer, specifying the maximum number of history entries (“visits”) the browser should keep when expiring old entries. Default value is 20000.

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Caveats

Even if there are fewer history entries than this preference specifies, history entries may expire based on their age, per browser.history_expire_days.

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