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when i restart my computer everytime it shows that window in firefox was open -. the last time it showed a u-tube sight that i nvr used

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when i restart my computer it shows that several windows are still open in firefox-even though i always close all windows when i shut down my computer. the last time it said i had a utube sight open that i never even looked at. it seems that security on my computer has been compromised.

when i restart my computer it shows that several windows are still open in firefox-even though i always close all windows when i shut down my computer. the last time it said i had a utube sight open that i never even looked at. it seems that security on my computer has been compromised.

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

Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox profile folder.

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