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.

app tabs open twice - as full tabs and as app tabs

  • 1 reply
  • 5 have this problem
  • 4 views
  • Last reply by cor-el

hdcoyle
hdcoyle
more options

App tabs open on left as usual -- but also open full tabs in front of other Home Page tabs

This is only in Windows 7 -- Macintosh opens app tabs on left, then regular tabs

App tabs open on left as usual -- but also open full tabs in front of other Home Page tabs This is only in Windows 7 -- Macintosh opens app tabs on left, then regular tabs

All Replies (1)

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

This can 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

  • 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.

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

See: