Browser.history expire sites

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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 determines the upper cap on the number of websites to keep in history.

Possible values and their effects

A positive integer specifying the maximum number of websites to keep in history. Default value is 40000.


SeaMonkey 2

Edit → Preferences → Browser → History / Browsing History → Remember up to ___ visited pages”

First checked in

2007-12-05 by Dietrich Ayala

Has an effect in

  • Mozilla Firefox (nightly builds since 2007-12-05)
  • SeaMonkey 2.0a3 and above

Related bugs

Related preferences