This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

"New Tab" Replacing Open Tabs on Startup

  • 3 replies
  • 1 has this problem
  • 17 views
  • Last reply by cor-el

JaZzCanary
JaZzCanary
more options

The last two times I have started Firefox I have lost open tabs. In place of the tabs that should be open, I find several new tabs in their place. Even if I use the "restore all tabs" feature, I can't get them back and the "restore previous session" option is grayed out so I can't use it.

This is VERY frustrating!

I am on Windows 7 and have Firefox 44.0. I've used the program for years and have loved it, but lately not so much!

Installed Plug-Ins:

  • Adobe PDF Plug-In For Firefox and Netscape 15.9.20069
  • Citrix Online App Detector Plugin
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Next Generation Java Plug-in 11.31.2 for Mozilla browsers
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • ScorchPlugin
  • Shockwave Flash 20.0 r0
  • Adobe Shockwave for Director Netscape plug-in, version 12.1.8.158
  • 5.1.41105.0
  • Windows Activation Technologies Plugin for Mozilla
The last two times I have started Firefox I have lost open tabs. In place of the tabs that should be open, I find several new tabs in their place. Even if I use the "restore all tabs" feature, I can't get them back and the "restore previous session" option is grayed out so I can't use it. This is VERY frustrating! I am on Windows 7 and have Firefox 44.0. I've used the program for years and have loved it, but lately not so much! Installed Plug-Ins: * Adobe PDF Plug-In For Firefox and Netscape 15.9.20069 * Citrix Online App Detector Plugin * NPRuntime Script Plug-in Library for Java(TM) Deploy * Next Generation Java Plug-in 11.31.2 for Mozilla browsers * The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site. * ScorchPlugin * Shockwave Flash 20.0 r0 * Adobe Shockwave for Director Netscape plug-in, version 12.1.8.158 * 5.1.41105.0 * Windows Activation Technologies Plugin for Mozilla
Attached screenshots

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can check for problems with the sessionstore.js file in the profile folder that stores session data. When sessionstore.js is deleted you lose App Tabs and Tab Groups and open tabs and you will have to recreate them, so if necessary make a note or bookmark them.

You can use this button to go to the current Firefox profile folder:

Try to use one of these to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.

  • "3-bar" menu button > Exit (Power button)
  • Windows: File > Exit
  • Mac: Firefox > Quit Firefox
  • Linux: File > Quit

Also make sure that you give Firefox enough time to close completely before shutting down the computer. You can check that in the Windows Task Manager.

JaZzCanary
JaZzCanary Question owner
more options

Thanks, but the problem isn't on the Mac, it's on my PC.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

The instructions also apply to the Windows platform.

What don't you understand?