Are you closing all open tabs before closing Firefox?

Are you automatically reopening tabs and windows from the previous session via session restore?

• Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

Firefox stores cookies used in tabs that are currently open in the sessionstore.js file as part of saved session data, so those cookies will be restored if Firefox is closed without first closing these tabs.

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

• Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
• http://kb.mozillazine.org/Profile_folder_-_Firefox
• http://kb.mozillazine.org/Multiple_profile_files_created

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).

Thanks for your feedback. Yes I close all tabs and use the EXIT and not X

I have a start up page so opening last tab also not it. When I start a new tab it fills with nine previously visited and puts the cookies back too.

I'll try profile option - if that 's no good I guess it's on to Safari.

Thanks for your help.