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How to (force?) load a backup version of session file due to clean start after Firefox crash?

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  • Τελευταία απάντηση από cor-el

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Hello. I can't restore session from backup using advices which were provided in another answers on this forum.

Steps to reproduce:

- open a lot of tabs
- Firefox has been crashed (well, I had to use `kill -15 PID' actually, since it has been frozen first)
- note that sessionstore.jsonlz4 doesn't exist anymore in profile directory, so current session has been wiped away completely
- start Firefox
- see a new clean session and note, that "..." menu > "Restore Previous Session" is grayed out
- close Firefox
- find the latest (by time) session backup file in your profile directory: mine is sessionstore-backups/recovery.jsonlz4
- use it as a new current session file (e.g., shell command from profile directory): cp sessionstore-backups/recovery.jsonlz4  sessionstore.jsonlz4
- start Firefox again

What should happen:

- Firefox should restore session from a "new" sessionstore.jsonlz4 backup file OR make "Restore Previous Session" option is available

What happens:

- clean session again
- "Restore Previous Session" is not available
- try another session backup files: same results

What am I doing wrong?

Thanks in advance.

P.S. Yes, I know that I can use https://www.jeffersonscher.com/res/scrounger.html * to get links from session file and manually restore my session, but shouldn't Firefox do it automagically for me? Is there any extension, so I can 'force' Firefox to load session from backup file? Now, when Firefox starts, looks like it's just can't "see" sessionstore.jsonlz4 file.

Hello. I can't restore session from backup using advices which were provided in another answers on this forum. Steps to reproduce: - open a lot of tabs - Firefox has been crashed (well, I had to use `kill -15 PID' actually, since it has been frozen first) - note that sessionstore.jsonlz4 doesn't exist anymore in profile directory, so current session has been wiped away completely - start Firefox - see a new clean session and note, that "..." menu > "Restore Previous Session" is grayed out - close Firefox - find the latest (by time) session backup file in your profile directory: mine is sessionstore-backups/recovery.jsonlz4 - use it as a new current session file (e.g., shell command from profile directory): cp sessionstore-backups/recovery.jsonlz4 sessionstore.jsonlz4 - start Firefox again What should happen: - Firefox should restore session from a "new" sessionstore.jsonlz4 backup file OR make "Restore Previous Session" option is available What happens: - clean session again - "Restore Previous Session" is not available - try another session backup files: same results What am I doing wrong? Thanks in advance. P.S. Yes, I know that I can use https://www.jeffersonscher.com/res/scrounger.html * to get links from session file and manually restore my session, but shouldn't Firefox do it automagically for me? Is there any extension, so I can 'force' Firefox to load session from backup file? Now, when Firefox starts, looks like it's just can't "see" sessionstore.jsonlz4 file. *Note: since I've got ~6.7MB session file, I get browser freezes using JS version, so I prefer this standalone local tool - https://github.com/avih/dejsonlz4

Όλες οι απαντήσεις (4)

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If there is no session save or none showing you can't update something that isn't there.

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Separate Issue; Your System Details shows;

Installed Plug-ins

Shockwave Flash 28.0 r0 Shockwave Flash 27.0 r0
Having more than one version of a program may cause issues. You must remove the older programs. Then get the current full installer.

Flash: Grab the uninstaller from here:

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows

http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac

Then reinstall the latest version.

Note: Windows users should download the active_x for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the active_x.

Flash Player Version 28.0.0.137

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only>


See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

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WestEnd said

If there is no session save or none showing you can't update something that isn't there.

Yes, there are a few valid jsonlz4 session files. They can be "unpacked" by mentioned lz4 tool. I can see session information (windows/tabs with links) inside these unpacked regular js files. But they can't be loaded by Firefox automatically (as it should) - that's a problem.

So I just would like to know (as one of possible solution): maybe is there any way to force Firefox use particular session file on start since simple file replacement don't do the trick?

Thank you for your respond.

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I'm not sure if Firefox tries to restore a session from files in the sessionstore-backups folder when you kill Firefox. I think that this should work in most cases and you get presented with the about:sessionrestore page. A sessionstore.jsonlz4 file only gets created when Firefox closes properly, otherwise there are only the files in the sessionstore-backups folder.

You can set this pref to 0 on the about:config page to get the about:sessionrestore page immediately with the first start after a crash has occurred or the Task Manager was used to close Firefox.

  • browser.sessionstore.max_resumed_crashes = 0