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My recently added tabs are restored only partially after restarting Firefox 4

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I changed the following browser.sessionstore.max_tabs_undo;50 browser.sessionstore.max_windows_undo;12

At some point after that in the following sequence: 1. most of recently added tabs and some windows didn't restore after Firefox restart 2. some recently deleted tabs disappeared from "recently closed tabs" in history 3. recently closed windows in history disappeared

Have anybody changed this and got similar problems? Imho, it's history storage related.

I changed the following browser.sessionstore.max_tabs_undo;50 browser.sessionstore.max_windows_undo;12 At some point after that in the following sequence: 1. most of recently added tabs and some windows didn't restore after Firefox restart 2. some recently deleted tabs disappeared from "recently closed tabs" in history 3. ''recently closed windows'' in history disappeared Have anybody changed this and got similar problems? Imho, it's history storage related.

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Are you running Firefox in "Permanent Private Browsing" mode?

You enter Private Browsing mode if you select: Tools > Options > Privacy > History: Firefox will: "Never Remember History"
To see all History and Cookie settings, choose: Tools > Options > Privacy, choose the setting Firefox will: Use custom settings for history

  • Uncheck: [ ] "Permanent Private Browsing mode"

It is also possible that there is a problem with the files sessionstore.js and sessionstore.bak in the Profile Folder

Delete sessionstore.js and sessionstore.bak in the Profile Folder

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder

If you see files sessionstore-##.js with a number in the left part of the name like sessionstore-1.js then delete those as well.

Deleting sessionstore.js will cause App Tabs and Tab Groups to get lost, so you will have to create them again (make a note).

See:

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@cor-el. Thanks for reply.

1. I'm not using private browsing.

2. If I get rid of sessionstore, it defies the whole purpose - to restore what's done recently(and not just recently;-)


I got annoyed with frequent hangs and crashes and decided to go back to 3.6 and the problem disappeared - at least for now.

As for 4 that looks like a bug to me.