Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do i stop my app tabs from disapearing whenever I turn off my computer?

  • 13 replies
  • 111 have this problem
  • 346 views
  • Last reply by babuganoosh

more options

My app tabs disappear whenever I restart or shut down my computer in Mac OS X. I don't have this problem in windows. I've looked through support countless times and no, my problem is not that I have "clear history" checked in my preferences.

Just a side note, I was really excited for Firefox 4. Seemed really cool and was very fast. This app tab thing was my favorite new feature, and I'm very disappointed that it doesn't work the way it should. And until this problem is fixed Mozilla, I'm going back to Google Chrome.

Chosen solution

App tabs and Tab Groups (Panorama) are stored as part of the session data in the file sessionstore.js in the Firefox Profile Folder


There may be a problem with the files sessionstore.js and sessionstore.bak in the Profile Folder

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

You will have to redo App Tabs and Tab Groups after deleting sessionstore.js.

See:

Read this answer in context 👍 3

All Replies (13)

more options

Chosen Solution

App tabs and Tab Groups (Panorama) are stored as part of the session data in the file sessionstore.js in the Firefox Profile Folder


There may be a problem with the files sessionstore.js and sessionstore.bak in the Profile Folder

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

You will have to redo App Tabs and Tab Groups after deleting sessionstore.js.

See:

more options

How do I access the Profile Folder? I clicked your hyperlinks but I couldn't figure out how to get to the folder.

If I delete the files that you mentioned, will it have any other effects (negative or otherwise) on Firefox or my computer?

more options

No, Firefox will create new files if you delete the current existing files and hopefully it will solve your problems.

more options

Cool, but how do I get to the profile folder? I'm running Mac OS X.

more options

You can use:

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

Aight, seems the app tabs are loading normally. Thank God. And thank you cor-el, you've been most helpful. I'll be sure to let you know if any other issues arise, hope they won't.

I hope Mozilla is compensating you for all your great work, you should be working for them (Just a thought).

Modified by babuganoosh

more options

You're quite welcome.

more options

Hey cor-el, I'm having the same problem again. Should I delete the files I deleted last time? Or is there another solution? I'm tired of setting up my app tabs only to have them dissappear on me again and again.

more options

You can try this extension if you keep losing App Tabs:

more options

Okay, I'll give it a shot.

more options

this is way too complicated for a non-techy like me. I'd only just patted myself on the back for figuring out how to create app tabs in the first place!! Hopefully there'll be a simpler solution soon as it's a real pain that the app tabs keep disappearing!

more options

Try the extension if you do not know how to check the Delete browsing, search and download history on Firefox settings

App Tab Initializer: https://addons.mozilla.org/firefox/addon/app-tab-initializer/

more options

The extension didn't work. Still kept loosing ap tabs.