Can you please ask your question in the English language? Thanks. Ray

Hi mamzav82,

Apologies for replying in English, but you're currently posting in our English forum.

I used a translation tool, and it looks like you're dealing with tab lost issue. To recover your previous session, you may want to check out the following article Restore previous session - Configure when Firefox shows your most recent tabs and windows which should also available in Russian.

Hi, I think you used the feature to restore an earlier set of bookmarks (Restore bookmarks from backup or move them to another computer). Unfortunately Firefox does not have a feature to restore any sets of tabs other than your immediately previous session.

Could you check whether either of these are available (not hidden or grayed out):

• "3-bar" menu button > Журнал > Восстановить предыдущую сессию
• (menu bar) Журнал > Восстановить предыдущую сессию

If they are missing or grayed, check either:

• "3-bar" menu button > Журнал > Недавно закрытые окна
• (menu bar) Журнал > Недавно закрытые окна

If that doesn't help...

Firefox creates numerous session history files, but because session history is only for the immediately previous session, it is unfortunately too easy to lose it. Could you start by making a backup of your existing session history files? Here's how:

(1) To open your profile folder...

You can open your current Firefox settings (AKA Firefox profile) folder using either

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

In the first table on the page, find the Profile Folder row and click the "Open Folder" button. This should launch Windows' File Explorer listing the contents of your current profile folder.

(2) Copy out session history files

In your profile folder, double-click into the sessionstore-backups folder. Save all files here to a safe location such as your Documents folder.

(3) What files did you find?

The kinds of files you may find among your sessionstore files are:

• recovery.jsonlz4: the windows and tabs in your currently live Firefox session (or, if Firefox crashed at the last shutdown and is still closed, your last session)
• recovery.baklz4: a backup copy of recovery.jsonlz4
• previous.jsonlz4: the windows and tabs in your last Firefox session
• upgrade.jsonlz4-build_id: the windows and tabs in the Firefox session that was live at the time of your last update

Sometimes you can tell from the last modification time which one will have your missing tabs, but not always.

Optional File Contents Preview

These compressed files are a pain to view, so I created a tool on my website to list out their contents. If you want to try that, you can drag and drop it onto the large box on the following page, then click the "Scrounge URLs" button. Either:

• https://www.jeffersonscher.com/ffu/scrounger.html
• https://jscher2000.github.io/Firefox-File-Utilities/scrounger.html

If you don't get a list within 15 seconds, that probably means the script is caught in a loop. You may need to close the tab to avoid a tab crash and then try again in a new tab.

If you get a useful list, use the "Save List" button to archive it as a web page of clickable links for future reference, in case no other approach is successful.

спасибо, все кто ответили. я уже вручную всё восстановил. простите, что не перевёл на инглишь