i change my system today and when it finished i could not find the bookmark and the password saved for more than 3 years now

Hi Mohamed, do you mean you have a new computer, or did you reset your old computer?

Either way, after installing Firefox, I assume you connected Firefox to your Firefox Account using your existing username and password. (Resetting your password without a recovery key would have cleared the data.)

Sometimes Sync is slow. To see what data is stored for your account in the Sync cloud, you can use an add-on:

(1) Install the About Sync add-on from: https://addons.mozilla.org/firefox/addon/about-sync/

(2) After installing About Sync, type or paste about:sync in the address bar and press Enter to load a page of data about the contents of your account.

(3) In each category of data, you can use the "Records (table)" mini-tab to see what is stored in the cloud. Is the data there?

I lost all my old date today

What were the steps leading up to the data loss?

finish up my windows and get Firefox than login waited for the Sync but nothing happened

Try using the About Sync add-on to check whether the data is in your account. (see steps in the earlier reply)

Can't read and change date on this site

Can't read and change date on this site

Okay. Try the second step here:

(1) Install the About Sync add-on from: https://addons.mozilla.org/firefox/addon/about-sync/ (2) After installing About Sync, type or paste about:sync in the address bar and press Enter to load a page of data about the contents of your account. (3) In each category of data, you can use the "Records (table)" mini-tab to see what is stored in the cloud. Is the data there?

Mohamed Elsweefy said

Can't read and change date on this site

Okay. Try the second step here:

jscher2000 - Support Volunteer said

(1) Install the About Sync add-on from: https://addons.mozilla.org/firefox/addon/about-sync/ (2) After installing About Sync, type or paste about:sync in the address bar and press Enter to load a page of data about the contents of your account. (3) In each category of data, you can use the "Records (table)" mini-tab to see what is stored in the cloud. Is the data there?

I found the new Sync that made today not the past one

If you only have one Firefox Account, then it sounds like your old data is not in the Sync cloud.

Do you still have access to the old computer?

I am using it right now i just change the system

Oh, you upgraded an earlier version of Windows to Windows 11?

Did the update create this folder:

C:\Windows.old

That is a folder which preserves data from your previous installation temporarily for up to 28 days.

If you find that folder in Windows File Explorer:

Set Windows to show hidden files and folders -- this Microsoft article has the steps:

https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5

Then explore that folder up to this point (if it exists):

C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\

If you find recent data there, please pause and we can suggest how to resurrect your saved files.

Oh, you upgraded an earlier version of Windows to Windows 11? Did the update create this folder: C:\Windows.old That is a folder which preserves data from your previous installation temporarily for up to 28 days. If you find that folder in Windows File Explorer: Set Windows to show hidden files and folders -- this Microsoft article has the steps: https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5 Then explore that folder up to this point (if it exists): C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\ If you find recent data there, please pause and we can suggest how to resurrect your saved files.

did not create it delete them and install all new windows

Oh, you upgraded an earlier version of Windows to Windows 11? Did the update create this folder: C:\Windows.old That is a folder which preserves data from your previous installation temporarily for up to 28 days. If you find that folder in Windows File Explorer: Set Windows to show hidden files and folders -- this Microsoft article has the steps: https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5 Then explore that folder up to this point (if it exists): C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\ If you find recent data there, please pause and we can suggest how to resurrect your saved files.

I found that folder but I cant find firefox

jscher2000 - Support Volunteer said

Oh, you upgraded an earlier version of Windows to Windows 11? Did the update create this folder: C:\Windows.old That is a folder which preserves data from your previous installation temporarily for up to 28 days. If you find that folder in Windows File Explorer: Set Windows to show hidden files and folders -- this Microsoft article has the steps: https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5 Then explore that folder up to this point (if it exists): C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\ If you find recent data there, please pause and we can suggest how to resurrect your saved files.

did not create it delete them and install all new windows

i searched for it and i think i found file named " firefox.browser " with size 2.28KB

jscher2000 - Support Volunteer said

Did the update create this folder: C:\Windows.old That is a folder which preserves data from your previous installation temporarily for up to 28 days. If you find that folder in Windows File Explorer: Set Windows to show hidden files and folders -- this Microsoft article has the steps: https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5 Then explore that folder up to this point (if it exists): C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\ If you find recent data there, please pause and we can suggest how to resurrect your saved files.

I found that folder but I cant find firefox

How far did you get in the path -- is there a Mozilla folder?

C:\Windows.old\Users\<username>\AppData\Roaming\Mozilla\

Are there other folders under

C:\Windows.old\Users\<username>\AppData\Roaming\

after that path the only folder is named " Microsoft "

My last thought is to check here for any older folders -- type or paste the following into the Windows File Explorer address bar (or Windows search box):

%APPDATA%\Mozilla\Firefox\Profiles

That should expand to:

C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles

You should find your current profile folder and the question is what is in any other folders. In each folder, you can check the bookmarkbackups folder to see how old that profile is.

My last thought is to check here for any older folders -- type or paste the following into the Windows File Explorer address bar (or Windows search box): %APPDATA%\Mozilla\Firefox\Profiles That should expand to: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles You should find your current profile folder and the question is what is in any other folders. In each folder, you can check the bookmarkbackups folder to see how old that profile is.

if i found another firefox old date like year ago can i copy it to the same path and get that date work ?

What files did you find? This article mentions what is in the files: Recover important data from an old profile