Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

為了改善您的使用體驗,本網站正在進行維護,部分功能暫時無法使用。若本站的文件無法解決您的問題,想要向社群發問的話,請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問,我們的社群成員將很快會回覆您的疑問。

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

How to recover firefox deleted history?

  • 4 回覆
  • 0 有這個問題
  • 13 次檢視
  • 最近回覆由 Dropa

more options

How can I recover the history that has been deleted from firefox? Already there is an article from 2020 which says to find index.dat file but there is no .dat file that i can find. I am looking for the file in the following location: AppData\Local\Mozilla\Firefox\Profiles\83ctti6r.default-release\cache2 and that location is the only one with a file named index but it is without .dat extension. If that is supposed to be the file that I am to use then which .dat file reader do I use to open it and recover the history.

How can I recover the history that has been deleted from firefox? Already there is an article from 2020 which says to find index.dat file but there is no .dat file that i can find. I am looking for the file in the following location: AppData\Local\Mozilla\Firefox\Profiles\83ctti6r.default-release\cache2 and that location is the only one with a file named index but it is without .dat extension. If that is supposed to be the file that I am to use then which .dat file reader do I use to open it and recover the history.
附加的畫面擷圖

所有回覆 (4)

more options

No, that cache2 folder is the folder used for the disk cache, see the about:cache page for more detail. Firefox stores the history along with the bookmarks in a SQLite database named places.sqlite, so no index file is used.

Firefox uses two locations in the hidden "AppData" location for the Firefox profile folder. One location in "AppDataRoaming" for personal data like bookmarks and logins and another location in "AppDataLocal" for temporary files like the disk cache, so make sure to look in the correct location.

Primary location used for the main profile that keeps your personal data (Root Directory on about:profiles).


  • bookmarks and history: places.sqlite
  • favicons: favicons.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (encrypted logins) and key4.db (encryption key/primary password) for logins saved in the Password Manager
  • cert9.db for certificates stored in the Certificate Manager
  • persdict.dat for words added to the spell checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)
more options

To recover deleted history, you need a backup copy of places.sqlite that still has this history.

more options

cor-el said

To recover deleted history, you need a backup copy of places.sqlite that still has this history.


If i restore a previous version of the places.sqlite file then the history would be restored in the browser as well?

由 sarcasmattop 於 修改

more options

sarcasmattop said

cor-el said

To recover deleted history, you need a backup copy of places.sqlite that still has this history.


If i restore a previous version of the places.sqlite file then the history would be restored in the browser as well?

This depends on how long back the recovery file was last saved.