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.

firefox produces duplicate copies of pages and tabs

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

E. Alvin Davis
E. Alvin Davis
more options

Firefox is generating duplicate (and more) copies of the my windows and tabs. I've uninstalled but sill get the same result. When I close one of the duplicates windows, all of them close.

BTW, I have the Session Manager addon installed. Even when I close all pages and attempt to start a brand new window, the last session's multiple windows and duplicates are displayed.

Thanks in advance for any help you can give me.

Firefox is generating duplicate (and more) copies of the my windows and tabs. I've uninstalled but sill get the same result. When I close one of the duplicates windows, all of them close. BTW, I have the Session Manager addon installed. Even when I close all pages and attempt to start a brand new window, the last session's multiple windows and duplicates are displayed. Thanks in advance for any help you can give me.

All Replies (1)

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

You may have a bad sessionstore.js file.

You can check for problems with the sessionstore.js file in the Firefox profile folder that store session data.

Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost and you will have to recreate them (make a note or bookmark them if possible).

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window