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Firefox startup windows and tab

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Is there a way to increase the sessionstore-backup or having a custom script to backup it whenever firefox got run?

Because sometimes, when I run firefox, my 100+ tabs are gone and the sessionstore-backup files got overwrited (probably because i open another instance before and close it w/o noticing I'm loosing all the tab).

Is there a way to increase the sessionstore-backup or having a custom script to backup it whenever firefox got run? Because sometimes, when I run firefox, my 100+ tabs are gone and the sessionstore-backup files got overwrited (probably because i open another instance before and close it w/o noticing I'm loosing all the tab).

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jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
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The first thing to check is whether either of these are available (not hidden or grayed out):

  • "3-bar" menu button > History > Restore Previous Session
  • (menu bar) History > Restore Previous Session

If they are missing or grayed, check either:

  • "3-bar" menu button > History > Recently Closed Windows
  • "Library" toolbar button > History > Recently Closed Windows
  • (menu bar) History > Recently Closed Windows

By default, you should be able to recover up to 3 closed windows.

And I know what you mean about closing a window before you realize the consequences. Firefox doesn't have a method to prevent your older session from being replaced in that scenario, so I turned on the first checkbox on the Settings page to protect myself from that situation:

Startup [x] "Open previous windows and tabs"

There are some session-related add-ons you could consider as a further backup. These keep track of the current page in the open tabs, but do not store the full back-forward history of those tabs. I haven't tested any of these in the last year, but as a starting point:

Use database storage:

Use bookmark storage:

Bookmark storage is more robust in that Firefox backs it up regularly. However, having the extra data show up when you are searching your bookmarks may be annoying.

cor-el
cor-el
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You can try to restore a recent upgrade.jsonlz4-<build_id> when available or use a utility to browse Windows System Restore points to see if you can find a recent sessionstore.jsonlz4 file.

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

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
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jscher2000 - Support Volunteer said
The first thing to check is whether either of these are available (not hidden or grayed out):
  • "3-bar" menu button > History > Restore Previous Session
  • (menu bar) History > Restore Previous Session
If they are missing or grayed, check either:
  • "3-bar" menu button > History > Recently Closed Windows
  • "Library" toolbar button > History > Recently Closed Windows
  • (menu bar) History > Recently Closed Windows

I have that option enable. I'll try the extentions you suggest to me. I hope it could help little bit. Also, here the common scenario where I loose my the tabs. Google Drive. Sometimes, the recent ly closed windows/tabs are greyout.

cor-el said
You can try to restore a recent upgrade.jsonlz4-<build_id> when available or use a utility to browse Windows System Restore points to see if you can find a recent sessionstore.jsonlz4 file.

I did, but sometimes the tabs was too old and I already delete/add a lot of tabs. Well, not all the tabs was importany, but when its gone, it just soo annoying.