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Cannot access/recover 7,500 tabs from old profile

  • 9 replies
  • 1 has this problem
  • 18 views
  • Last reply by jscher2000

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Hi,

This is my first time posting here. I had written detailed information, then scrolled down to the troubleshooting information section and made the mistake of clicking: try these manual steps.

That link should have opened in a new tab! I lost everything I wrote here, pressing back didn't preserve the text I had entered here.

I have 7,500 tabs in an old profile on my laptop. After many crashes and using Refresh, I can't fix it as I did before.

Please fix this Ask Your Question page so it doesn't lose what I've written here so easily. Show a warning, and open links in new tabs.

And Firefox should have an option to automatically bookmark open tabs so that if anyone experiences this crash/corruption I've had, all their open tabs are safely backed up in bookmarks and Firefox sync.

Also the Submit Feedback button in Firefox's help menu is still going to a page showing: Please check back soon. Feels like it's been a month since I was last able to send feedback. Please fix this!

Thanks!

All Replies (9)

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Hi Aku, sorry about the site problems. Let's focus on your Firefox.

Aku said

I have 7,500 tabs in an old profile on my laptop. After many crashes and using Refresh, I can't fix it as I did before.

That is a lot of tabs.

Is the problem that the old profile won't run any more? Or that the old profile runs but the session won't restore any more?

What were you doing to fix it before that isn't working now?

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Hi jscher2000, Thanks for your fast response!

I used to have 9,300+ tabs in 70 separate Firefox windows a few months back. That never had problems. Then one day it crashed and I managed to recover it, bookmarked some of those windows and brought it down to a few windows.

It was working fine with about 7,000 tabs but recently I used Refresh and that would hang quite often. I had to select only my main window, selecting all windows would crash Firefox. Seems Refresh is not suited to recovering 1,000s of tabs.

Right now I have old profiles from Refresh in the Old Firefox Data folder automatically created after Refresh. Not helpful that they're not date/time stamped and all in the same folder. Fortunately I can sort by modification date in Caja file manager.

After copy/pasting in my old profile and correcting the profile names in the installs.ini and profiles.ini files, Firefox starts but the tab scroll bar is shown wrong.

Before, I had opened a new window, then quit Firefox, closing 2 windows with 7,500 tabs, and it restarted with 4,500 tabs. Firefox crashed again recently and that same process recovered just 314 tabs in my main window. I opened list all tabs and jumping to the middle of my tabs list, I saw empty/ghost tabs. Those might be corrupted/lost.

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Aku said

I opened list all tabs and jumping to the middle of my tabs list, I saw empty/ghost tabs. Those might be corrupted/lost.

It's possible.

I have some tools for working with session files, but I don't think they can handle one that large, so our best hope is to get Firefox to accept them.

Do you have a safe copy of files from before the most recent calamities? These might include a previous.jsonlz4 file from your live profile, and files that start with upgrade.jsonlz4 from your Firefox 84 update if you got that in recent days, or from Firefox 83 some time ago, also in the sessionstore-backups folder.

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You can try to decompress the file with code in the Browser Console.

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jscher2000 said

Do you have a safe copy of files from before the most recent calamities? These might include a previous.jsonlz4 file from your live profile, and files that start with upgrade.jsonlz4 from your Firefox 84 update if you got that in recent days, or from Firefox 83 some time ago, also in the sessionstore-backups folder.

Sorry about the late reply! I hope both of you had a nice Christmas.

In my first post I should have mentioned I'm on Solus Mate. I checked my update history, and the last full system update I completed was on Friday 11th December 2020. So Firefox has been out of action for the last 3 weeks. Solus got Firefox 84 on Friday 18th December: https://dev.getsol.us/source/firefox/ I'm still on Firefox 83.

In my current Firefox profile, in sessionstore-backups, I see: Previous.jsonlz4 Recovery.baklz4 Recovery.jsonlz4 Upgrade.jsonlz4-2020-11-16 (added hyphens in the date) These 4 files are around 1 MB in size.

In the oldest profile folder I have saved from 11th December, I see the same Previous and 2 Recovery files, but with 3 Upgrade files. Previous and Recovery files are 2.6 MB, Upgrade files are 3.9, 4.0 and 3.2 MB, oldest to newest.

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cor-el said

You can try to decompress the file with code in the Browser Console.

I saw this: "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 (make sure to backup the current sessionstore.jsonlz4)."

And now I noticed in my current profile, sessionstore.jsonlz4 is missing, after sessionCheckpoints.json. Okay now it's back after closing the private window I had open !

I guess I'd have to copy/paste a backed up sessionstore and replace it in the main profile folder ? Or should I install the latest Solus updates including Firefox 84 and maybe this will fix the session ?

Thanks

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I wrote a long detailed reply and pressed post reply here, on my phone, using Firefox Nightly. Now I don't see that reply. At the top I see: Last reply by Aku, 15 mins ago. I had pressed post reply at 02:45.

Ok, so this posted fine, even after pressing preview reply. I'll have to write my long reply again :(

Now I see my long reply is visible !

Modified by Aku

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When you post a reply that contains external links or special numbers that trigger anti spam measures then this reply needs to be examined and approved by a moderator, so there can be a delay before your reply appears.

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

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Hi Aku, make sure to back up all those session history files somewhere that Firefox does not look, so it doesn't replace or remove any of them.

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