History.dat: Difference between revisions

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{{profile-file|filename=history.dat}}
{{profile-file|filename=history.dat}}
history.dat stores the browsing history: the record of all recently-visited pages. It should not to be confused with session history which controls the Back and Forward buttons, or with [[downloads.rdf | download history]] which stores details of files saved to the hard drive or opened with external programs. The [[History Sidebar]] provides an interface to view and edit this file.
The file "history.dat" stores the browsing history (a record of visited pages)  in Firefox 2 or below and in Mozilla Suite/SeaMonkey 1.x.  (Starting in Firefox 3 and SeaMonkey 2,  history.dat is no longer used and the browsing history, as well as bookmarks in Firefox 3, is stored in the file [[places.sqlite]].)
 
Browsing history should not to be confused with session history which controls the Back and Forward buttons, or with [[downloads.rdf | download history]] which stores details of files saved to the hard drive or opened with external programs. The History Sidebar provides an interface to view and edit this file.
 
By default, the browsing history is stored for 9 days.  If the history becomes long enough, the file can become large enough to greatly increase the startup time.  To reduce the startup time, you can delete all or part of your browsing history, or you can delete the file.


==Editing==
==Editing==
Because of the complexity of the storage format used in history.dat (called Mork), it is not recommended to edit this file manually. Changes can be made through the [[History Sidebar]].
The "history.dat" file is written in a complex format called "Mork". Changes can be made through the History Sidebar, but editing this file manually is not recommended.


==Moving==
==Moving==
This file can be moved to a different profile without any extra effort.
This file can be moved to a different profile.


==Deleting==
==Deleting==
Deleting history.dat will delete your browsing history. A new file containing browsing history will be created on startup or when it is first needed.
You can delete your history from the main menu (Tools => Clear Private Data...).  If you suspect that the file is corrupted, deleting "history.dat" will delete your browsing history, and a new, empty file will be created automatically.
 
==Related bug reports==
* [https://bugzilla.mozilla.org/show_bug.cgi?id=193236 Bug 193236 - History Window Excruciatingly Slow]
* [https://bugzilla.mozilla.org/show_bug.cgi?id=223476 Bug 223476 - large history makes Firefox painfully slow in several ways]
* [https://bugzilla.mozilla.org/show_bug.cgi?id=241438 Bug 241438 - please make history.dat easier to parse (i.e., not Mork)]
* [https://bugzilla.mozilla.org/show_bug.cgi?id=315020 Bug 315020 - Files can not be saved when history.dat is read only]
* [https://bugzilla.mozilla.org/show_bug.cgi?id=319004 Bug 319004 (fixed) - CVE-2005-4134 overlong document.title setting can corrupt history data, causing non-responsive temporary hang (crash?) on subsequent startups]
 


==See also==
==See also==
* [[Browser will not start up ]]
* [[Browser will not start up ]]
* [[Deleting autocomplete entries]]
* [[Deleting autocomplete entries]]
* [[Viewing the browsing history - Firefox]]
* [[browser.history_expire_days]]


[[Category:Profile contents (Firefox)]]
[[Category:Profile contents (Firefox)]]
[[Category:Profile contents (Mozilla Suite)]]
[[Category:Profile contents (Mozilla Suite)]]
[[Category:History]]

Latest revision as of 20:17, 19 June 2009

The file "history.dat" stores the browsing history (a record of visited pages) in Firefox 2 or below and in Mozilla Suite/SeaMonkey 1.x. (Starting in Firefox 3 and SeaMonkey 2, history.dat is no longer used and the browsing history, as well as bookmarks in Firefox 3, is stored in the file places.sqlite.)

Browsing history should not to be confused with session history which controls the Back and Forward buttons, or with download history which stores details of files saved to the hard drive or opened with external programs. The History Sidebar provides an interface to view and edit this file.

By default, the browsing history is stored for 9 days. If the history becomes long enough, the file can become large enough to greatly increase the startup time. To reduce the startup time, you can delete all or part of your browsing history, or you can delete the file.

Editing

The "history.dat" file is written in a complex format called "Mork". Changes can be made through the History Sidebar, but editing this file manually is not recommended.

Moving

This file can be moved to a different profile.

Deleting

You can delete your history from the main menu (Tools => Clear Private Data...). If you suspect that the file is corrupted, deleting "history.dat" will delete your browsing history, and a new, empty file will be created automatically.

Related bug reports


See also