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Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Firefox browser

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Lloyd Walters
Lloyd Walters
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I've written in with this problem before, but got no emailed notification of replies, and don't know how to locate my previous post. The problem has happened again today. 

I was running Firefox with four Windows open (fewer than I used to before this problem started happening) and maybe a dozen or more tabs in each window. Suddenly, all four windows disappeared, and when I got Firefox restarted, only three of the windows came back. There was no trace at all of the one I had been using (probably looking at a YouTube video), and the "History" top menu item had the "Recently Closed Windows" tab greyed out. So my window was lost without any trace of ir or of the tabs it contained.   Much like this has happened before, except that on this occasion, the window I was actually using was the one that disappeared. No error messages appear.

I always have Chrome running at the same time, with two windows open. I've not experienced any such problem there.

I'm using a desktop PC with Windows 10. I also have a laptop, similarly configured which has not suffered the same problem. (No Chrome there.) I'm running a paid for version of Avast on both machines.

I've written in with this problem before, but got no emailed notification of replies, and don't know how to locate my previous post. The problem has happened again today. I was running Firefox with four Windows open (fewer than I used to before this problem started happening) and maybe a dozen or more tabs in each window. Suddenly, all four windows disappeared, and when I got Firefox restarted, only three of the windows came back. There was no trace at all of the one I had been using (probably looking at a YouTube video), and the "History" top menu item had the "Recently Closed Windows" tab greyed out. So my window was lost without any trace of ir or of the tabs it contained. Much like this has happened before, except that on this occasion, the window I was actually using was the one that disappeared. No error messages appear. I always have Chrome running at the same time, with two windows open. I've not experienced any such problem there. I'm using a desktop PC with Windows 10. I also have a laptop, similarly configured which has not suffered the same problem. (No Chrome there.) I'm running a paid for version of Avast on both machines.

All Replies (3)

stygian.shift
stygian.shift
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you can find your previous questions and contributions here https://support.mozilla.org/en-US/user/lwalters

Lloyd Walters
Lloyd Walters Úinéir na ceiste
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Thanks for giving me the link to this area.

Now all I need is for someone to answer my question, which obviously refers to an extremely serious problem I'm getting with my Firefox browser.

cor-el
cor-el
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  • Top 10 Contributor
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Backup the session files in the sessionstore-backups folder in the Firefox profile folder to make sure not to lose possible important session data. Do NOT close Firefox when Firefox is already running.

You will normally find these files in the sessionstore-backups folder:

  • previous.jsonlz4 (cleanBackup: copy of sessionstore.jsonlz4 from previous session that was loaded successfully)
  • recovery.jsonlz4 (latest version of sessionstore.jsonlz4 written during runtime)
  • recovery.baklz4 (previous version of sessionstore.jsonlz4 written during runtime)
  • upgrade.jsonlz4-<build_id> (backup created during an upgrade of Firefox)

You can copy a file from the sessionstore-backups folder to the main profile and rename the file to sessionstore.jsonlz4 to replace the current file with Firefox closed.

  • make sure to backup the current sessionstore.jsonlz4

You can look at this tool to inspect a compressed jsonlz4 sessionstore file.