How to Upload a Dat File to Firefox

Cannot import data from Old FireFox data folder. Take followed all steps. No luck. Help please. SOLVED Thanks.

It seems I am not the only one with this trouble. Cannot import data from Old FireFox information file to my newly installed FireFox browser. I have followed the copy /paste steps given to no avail. Has anyone found a solution? SOLVED Thank you lot.

It seems I am not the just one with this problem. Cannot import information from Old FireFox data file to my newly installed FireFox browser. I accept followed the copy /paste steps given to no avail. Has anyone found a solution? SOLVED Thanks.

Modified by thebroochay

Chosen solution

You lot tin can either copy places.sqlite from the "Old Firefox Information" folder on the desktop to the current profile binder or restore the bookmarks from a compressed .jsonlz4 in the bookmarkbackups folder in the "Old Firefox Data" folder on the desktop.

  • Bookmarks -> Testify All Bookmarks -> Import & Backup -> Restore
  • https://back up.mozilla.org/en-United states/kb/restore-bookmarks-from-backup-or-movement-them

If you want to recover more personal data so meet my in a higher place answer for the details.

Y'all can employ the button on the "Assist -> Troubleshooting Data" (most:back up) page to become to the current Firefox profile folder or use the about:profiles folio.

  • Help -> Troubleshooting Information -> Profile Directory:
    Windows: Evidence Folder; Linux: Open Directory; Mac: Show in Finder
  • https://support.mozilla.org/en-US/kb/Profiles

Read this reply in context 👍 i

All Replies (xix)

Explicate in detail how you are trying to re-create the data, and what happens. Look on your desktop. Practice you see a folder chosen; '''Old Firefox?''' Look inside. Expect for the folder with the latest creation date. https://back up.mozilla.org/en-US/kb/recovering-important-data-from-an-former-contour https://support.mozilla.org/en-US/kb/back-and-restore-data-firefox-profiles https://support.mozilla.org/en-United states/kb/how-run-firefox-when-profile-missing-inaccessible

What data are yous trying to import/recover ?

What kind of issues did yous previously had that you lot decided to utilise the refresh feature in Firefox ?

What data are you trying to import/recover ? What kind of bug did you previously had that y'all decided to use the refresh feature in Firefox ?

Trying to recover my bookmarks. Bought a new hard drive and have reinstalled everything. I want to recover my older bookmarks from the Quondam FireFox Information folder that was from my old bulldoze.

Trying to recover my bookmarks. Bought a new difficult drive and have reinstalled everything. I want to recover my older bookmarks from the Old FireFox Data folder that was from my old drive.

FredMcD said

Explain in detail how you lot are trying to re-create the data, and what happens. I followed these steps : On the desktop you should encounter a binder chosen 'Old Firefox Information' open information technology and re-create all the data past highlighting and selecting everything in that folder, then right click and select re-create. Now open FIrefox. Head on over to well-nigh:profiles by typing information technology in your URL bar. Click on the Open Folder button nether the Local Directory, not root. Then right click when inside the new profile folder and select paste. Then restart Firefox. You should now have all your previous bookmarks, and information back. Nothing happens. My old bookmarks were not imported.

''FredMcD [[#answer-1257326|said]]'' <blockquote> Explicate in detail how you are trying to copy the data, and what happens. I followed these steps : ''On the desktop you should see a folder called 'Old Firefox Data' open up it and re-create all the data by highlighting and selecting everything in that folder, and so right click and select copy. Now open FIrefox. Head on over to about:profiles by typing it in your URL bar. Click on the Open Folder button nether the Local Directory, not root. And so right click when inside the new profile folder and select paste. And then restart Firefox. Yous should now take all your previous bookmarks, and data back.'' Aught happens. My old bookmarks were not imported.

If you still take the old drive hooked upwardly then you should be able to admission your previously used profile folder on that drive.

The Firefox contour folder is in a hidden location in AppData\Roaming, so make sure you lot can see hidden files and folders.

  • C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\
  • https://back up.microsoft.com/en-the states/help/14201/windows-testify-hidden-files

Y'all can copy files like these with Firefox airtight to the electric current profile folder to recover specific information.

  • bookmarks and history: places.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups binder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
    if you but take key3.db then brand sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if y'all simply have cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words you added to the spelling checker dictionary
  • permissions.sqlite for Permissions and perchance content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups binder)

Meet also:

  • https://support.mozilla.org/en-U.s.a./kb/recovering-important-information-from-an-old-profile

If y'all nevertheless take the old drive hooked up so yous should be able to access your previously used contour folder on that drive. The Firefox profile folder is in a subconscious location in AppData\Roaming, then make sure you can run across subconscious files and folders. *C:\Users\&lt;user&gt;\AppData\Roaming\Mozilla\Firefox\Profiles\&lt;profile&gt;\ *https://back up.microsoft.com/en-usa/aid/14201/windows-show-hidden-files ----- You can copy files like these with Firefox closed to the current contour folder to recover specific data. *bookmarks and history: places.sqlite *bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder *cookies.sqlite for the Cookies *formhistory.sqlite for saved autocomplete Class Data *logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption fundamental) for Passwords saved in the Password Manager<br>if you just accept key3.db then make sure to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if you just have cert8.db then make sure to remove an existing cert9.db *persdict.dat for words yous added to the spelling checker dictionary *permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific information (Site Preferences) *sessionstore.jsonlz4 for open up tabs and pinned tabs (see also the sessionstore-backups binder) See as well: *https://support.mozilla.org/en-U.s./kb/recovering-of import-information-from-an-old-profile

cor-el said

If you still accept the old drive hooked upwardly then yous should exist able to access your previously used contour folder on that drive. The Firefox profile folder is in a hidden location in AppData\Roaming, so make sure you lot can see subconscious files and folders.
  • C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<contour>\
  • https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files

Y'all can copy files like these with Firefox airtight to the current profile folder to recover specific data.

  • bookmarks and history: places.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Information
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption cardinal) for Passwords saved in the Password Manager
    if you but have key3.db then brand sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if y'all but take cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words you added to the spelling checker dictionary
  • permissions.sqlite for Permissions and peradventure content-prefs.sqlite for other website specific information (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (run across as well the sessionstore-backups binder)

Encounter likewise:

  • https://back up.mozilla.org/en-U.s./kb/recovering-important-information-from-an-old-contour

I practice not have the old drive. It crashed. I had a company remember all my data. I need to use the FireFox Old Information folder'south content to retreive my book marks.

''cor-el [[#reply-1257649|said]]'' <blockquote> If you lot still have the sometime drive hooked up then you should be able to access your previously used profile folder on that drive. The Firefox profile binder is in a subconscious location in AppData\Roaming, so brand sure you can see subconscious files and folders. *C:\Users\&lt;user&gt;\AppData\Roaming\Mozilla\Firefox\Profiles\&lt;profile&gt;\ *https://support.microsoft.com/en-us/aid/14201/windows-show-hidden-files ----- You can copy files like these with Firefox closed to the current profile folder to recover specific data. *bookmarks and history: places.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 (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager<br>if you only have key3.db and then make sure to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if you only have cert8.db and then make sure to remove an existing cert9.db *persdict.dat for words you lot added to the spelling 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 (come across likewise the sessionstore-backups binder) See besides: *https://support.mozilla.org/en-US/kb/recovering-important-information-from-an-old-profile </blockquote> I exercise not accept the sometime drive. It crashed. I had a company retrieve all my data. I need to use the FireFox Old Data folder's content to retreive my book marks.

Chosen Solution

Y'all can either copy places.sqlite from the "Former Firefox Information" folder on the desktop to the current profile folder or restore the bookmarks from a compressed .jsonlz4 in the bookmarkbackups folder in the "One-time Firefox Information" folder on the desktop.

  • Bookmarks -> Evidence All Bookmarks -> Import & Fill-in -> Restore
  • https://support.mozilla.org/en-United states/kb/restore-bookmarks-from-backup-or-move-them

If you want to recover more personal data then see my higher up answer for the details.

Yous tin apply the push on the "Help -> Troubleshooting Information" (well-nigh:support) page to get to the current Firefox profile folder or employ the about:profiles folio.

  • Help -> Troubleshooting Information -> Profile Directory:
    Windows: Evidence Folder; Linux: Open up Directory; Mac: Evidence in Finder
  • https://back up.mozilla.org/en-US/kb/Profiles

You tin can either copy places.sqlite from the "Old Firefox Data" folder on the desktop to the current profile binder or restore the bookmarks from a compressed .jsonlz4 in the bookmarkbackups folder in the "Old Firefox Data" folder on the desktop. *Bookmarks -> Show All Bookmarks -> Import & Backup -> Restore *https://back up.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them If y'all want to recover more personal information then see my to a higher place reply for the details. You can use the button on the "Help -> Troubleshooting Information" (about:support) page to get to the current Firefox contour folder or use the <b>about:profiles</b> page. *Help -> Troubleshooting Information -> Profile Directory:<br>Windows: Show Folder; Linux: Open up Directory; Mac: Show in Finder *https://support.mozilla.org/en-US/kb/Profiles

Cheers! Exactly what I needed to know and it worked.

'''Thank YOU!''' Exactly what I needed to know and information technology worked.

Could someone please assistance and explain how yous did this. I have attempted every solution listed hither but still cannot call up whatsoever of my bookmarks, passwords, saved logins or anything - Essentially my unabridged profile is lost despite even so possessing the former files.

In that location is no back up for issues on FF. You have to dig deep into these forums and go very technical and even so nothing solves the issue.

Hard to believe that this should be and then complicated. Other times Ive reinstalled FF - Information technology restarts right where information technology left off without all this headache.

Could someone please help and explain how y'all did this. I take attempted every solution listed here simply nonetheless cannot retrieve any of my bookmarks, passwords, saved logins or anything - Essentially my entire profile is lost despite still possessing the old files. In that location is no support for issues on FF. You have to dig deep into these forums and become very technical and still zippo solves the issue. Difficult to believe that this should be so complicated. Other times Ive reinstalled FF - It restarts right where information technology left off without all this headache.

Modified by Rafael Lecuona

'''Rafael Lecuona''' Look on your desktop. Do you lot run into a binder called; '''Old Firefox?''' Look inside. Wait for the folder with the latest creation engagement. https://back up.mozilla.org/en-Usa/kb/recovering-important-data-from-an-sometime-contour https://support.mozilla.org/en-U.s.a./kb/back-and-restore-data-firefox-profiles https://support.mozilla.org/en-U.s./kb/how-run-firefox-when-profile-missing-inaccessible

I did this. None of it worked. I have copied the old files into the new profile but I yet see no bookmarks later synching. None of my erstwhile settings seem to be recoverable despite this being the same hard drive. Last fourth dimension, I had no problem recovering my Firefox settings on a completely new hard disk. I thought Firefox had my settings saved with my account with my email. I meet no fashion to recover my old information.

I did this. None of information technology worked. I accept copied the former files into the new contour but I withal run across no bookmarks after synching. None of my onetime settings seem to be recoverable despite this being the same hard drive. Terminal fourth dimension, I had no problem recovering my Firefox settings on a completely new hd. I thought Firefox had my settings saved with my account with my email. I see no way to recover my old information.

Do y'all see whatsoever compressed .jsonlz4 backups in the bookmarkbackups folder that you could apply to restore the bookmarks, either in your electric current profile folder or in the "Old Firefox Data" binder on the desktop?

The proper name of an automatically created JSON bookmarks backup in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to forestall saving the same backup more than once. Y'all also see this count in the Restore menu driblet-down list.

  • bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.

Do y'all see any compressed .jsonlz4 backups in the bookmarkbackups binder that you lot could apply to restore the bookmarks, either in your current profile binder or in the "Erstwhile Firefox Data" folder on the desktop? The proper noun of an automatically created JSON bookmarks backup in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to prevent saving the aforementioned backup more than than once. You likewise see this count in the Restore menu drib-downwards listing. *bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.

Aye. I did all that and received a bulletin warning that information technology would replace all my current bookmarks with the ones from this file which is precisely what I desire to do just information technology did zilch at all. My old bookmarks and setting all remain unretrievable despite possessing the Quondam Firefox Data.

Yes. I did all that and received a message warning that it would replace all my current bookmarks with the ones from this file which is precisely what I want to do but information technology did cypher at all. My quondam bookmarks and setting all remain unretrievable despite possessing the One-time Firefox Data.

I deceit understand why the terminal time I reinstalled FF, this did not happen. I simply opened FF browser, logged in with my email and it instantly synched all my old settings despite being a completely new hard drive where no Former Firefox Information file was bachelor whatsoever longer. This fourth dimension, I have the same hard drive, I accept the Erstwhile FF Data file still logging into a new install on FF with my e-mail does not sync or retireve any of my account data. Assistance!

I cant understand why the last time I reinstalled FF, this did non happen. I simply opened FF browser, logged in with my email and information technology instantly synched all my old settings despite being a completely new hard drive where no Old Firefox Data file was available any longer. This time, I have the same hard drive, I have the Old FF Data file still logging into a new install on FF with my email does non sync or retireve any of my account information. Aid!

I have created new FF profiles for all the different older contour files from the past just none will piece of work. They merely produce a blank new version of FF with none of my information. Help!

I accept created new FF profiles for all the different older profile files from the past but none will work. They only produce a blank new version of FF with none of my data. HELP!

If you utilise the Profile Manager to create a new profile then this profile is blank, so you need to restore or import the bookmarks and possibly transfer other data to this new contour if you take confirmed that the new profile works.

You tin copy files like these with Firefox closed to the current profile folder to recover specific data. Note that you should be cautious with copying SQLite database files if y'all previously had problems.

  • bookmarks and history: places.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Information
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption cardinal) for Passwords saved in the Password Manager
    if you only accept key3.db then make sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if you only accept cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words y'all added to the spelling 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 (run across also the sessionstore-backups folder)

Yous can use the button on the "Help -> Troubleshooting Information" (about:support) page to get to the current Firefox profile folder or use the about:profiles page.

  • Help -> Troubleshooting Data -> Profile Directory:
    Windows: Evidence Binder; Linux: Open up Directory; Mac: Show in Finder
  • https://back up.mozilla.org/en-The states/kb/Profiles

If you employ the Profile Manager to create a new profile then this profile is blank, so you need to restore or import the bookmarks and possibly transfer other information to this new profile if you take confirmed that the new contour works. You can copy files like these with Firefox closed to the current profile folder to recover specific data. Note that yous should be cautious with copying SQLite database files if yous previously had problems. *bookmarks and history: places.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 (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager<br>if yous just have key3.db so make sure to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if y'all only accept cert8.db then make sure to remove an existing cert9.db *persdict.dat for words you added to the spelling checker dictionary *permissions.sqlite for Permissions and perhaps content-prefs.sqlite for other website specific data (Site Preferences) *sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder) You tin can use the push button on the "Assist -> Troubleshooting Information" (almost:back up) folio to go to the current Firefox contour folder or apply the <b>about:profiles</b> page. *Aid -> Troubleshooting Information -> Contour Directory:<br>Windows: Show Folder; Linux: Open up Directory; Mac: Show in Finder *https://support.mozilla.org/en-US/kb/Profiles

I did all of this and it did not piece of work. I cannot sympathize why my settings are not retrieved upon logging in with my e-mail every bit before. This is not the first fourth dimension I've had to uninstall and reload Firefox. I did not have to do any of this before. This fourth dimension around I take created multiple new profiles with each one of the older information files, to no avail. I followed all of the instructions and there is simply no retrieval of my old settings despite them sitting right there in plain sight in my Onetime Firefox Information file. This is absurdly complicated for a simple user.

I did all of this and information technology did not piece of work. I cannot sympathise why my settings are not retrieved upon logging in with my email every bit before. This is not the kickoff time I've had to uninstall and reload Firefox. I did not accept to do any of this before. This time around I have created multiple new profiles with each one of the older data files, to no avail. I followed all of the instructions and there is just no retrieval of my old settings despite them sitting right there in plain sight in my Onetime Firefox Data file. This is absurdly complicated for a unproblematic user.

Modified by Rafael Lecuona

cor-el said

>if you lot but have key3.db then brand sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Document Manager
    if you only take cert8.db then make sure to remove an existing cert9.db>
This means admittedly nothing to me. I am a simple browser user trying to sign dorsum into my business relationship but all my stuff is missing. I have copied and pasted multiple different profile files from the past - they include all of these files you mention. Not one of them worked in retrieving my settings. I'll accept to outset over from scratch to recover years of settings.

''cor-el [[#answer-1265656|said]]'' <blockquote> >if you only have key3.db then brand certain to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if you but have cert8.db then brand sure to remove an existing cert9.db> This means absolutely nix to me. I am a simple browser user trying to sign back into my account simply all my stuff is missing. I accept copied and pasted multiple dissimilar contour files from the past - they include all of these files yous mention. Not one of them worked in retrieving my settings. I'll take to commencement over from scratch to recover years of settings.

Rafael Lecuona said

cor-el said
>if you simply have key3.db and so brand sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if you only have cert8.db then make sure to remove an existing cert9.db>
This means admittedly nothing to me. I am a simple browser user trying to sign back into my business relationship but all my stuff is missing. I have copied and pasted multiple different profile files from the past - they include all of these files you lot mention. Not 1 of them worked in retrieving my settings. I'll have to get-go over from scratch to recover years of settings.

Amen to that. Complete disconnect betwixt FF staff and the ordinary customer. cert9.db to you, too, fellas.

''Rafael Lecuona [[#answer-1265665|said]]'' <blockquote> ''cor-el [[#respond-1265656|said]]'' <blockquote> >if you only have key3.db then make certain to remove an existing key4.db *cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager<br>if y'all simply take cert8.db then make certain to remove an existing cert9.db> This means admittedly nothing to me. I am a simple browser user trying to sign back into my business relationship but all my stuff is missing. I take copied and pasted multiple different contour files from the past - they include all of these files you mention. Not i of them worked in retrieving my settings. I'll accept to start over from scratch to recover years of settings. </blockquote> Amen to that. Complete disconnect between FF staff and the ordinary customer. cert9.db to you lot, besides, fellas.

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Source: https://support.mozilla.org/en-US/questions/1270211

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