Could you describe what you have tried?

To make sure you are copying the old sessionstore.js file to your currently active Firefox profile folder, you can open that folder from inside Firefox as follows (either):

• "3-bar" menu button > "?" button > Troubleshooting Information
• Help menu > Troubleshooting Information
• type or paste about:support in the address bar and press Enter

In the first table on the page, click the "Show Folder" button

Please note that before touching the existing sessionstore.js file, you should exit Firefox and allow time for it to close files. Either:

• "3-bar" menu button > "power" button
• File menu > Exit

Then rename it to sessionstore.old before copying in the file you want to use.

Note: if Windows does not show .js extensions on file, please see the steps in this article to show them so you can work with files as accurately as possible: http://support.microsoft.com/kb/865219

Make sure that you copy the sessionstore.js file to the correct location of the current Firefox profile folder.

You can use this button to go to the currently used Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)

many thanks - i have the file saved on the desktop - as firefox created a folder called "OLD FIREFOX" and it has several folders - session restore.js fileis is their - but when i copy it to the current firefox folder it still doesnt work! eventhough the file is correct and has the data saved at the old settings,.

You may have to look in the history if Firefox doesn't restore the session automatically ("Show my windows and tabs from last time").

• History > Restore Previous Session

yes i tried that also - !! any chance you can log in to my comp and check please- will be most appreciated

After you Restore Previous Session, could you check the menu for closed windows and tabs?

• "3-bar" menu button > History >
  • Restore Closed Tabs (in the current window)
  • Restore Closed Windows

• (menu bar) History >
  • Recently Closed Tabs (in the current window)
  • Recently Closed Windows

only got the recently closed tabs - but they do not show the prev login sessions- also ive lost all my book marks and history is their no chance anyone can login to sort it for me please? not that much clued up on computers-sorry

There are a lot of paid support services in Google search results that will remote into your computer, but I'm not sure any of the volunteers here are set up for that.

What happened to your bookmarks and history? Do you recall making any changes around the time that they disappeared?

If you check your desktop, can you find a folder named Old Firefox Data? If so, if you look inside it, do any of the folders seem to have been updated around the time that you lost your bookmarks, history, and session?

thank you for your replie- ok ive found that folder and most of the files on their are dated at the time it crashed

is their a way i can replace all the current files firfox is using - to previous files so i get all my data back?-

I recently posted a detailed set of steps for recovering from a reset: https://support.mozilla.org/questions/1012315#answer-607766