There might be a problem with your session history files getting locked and therefore Firefox doesn't update them. Could you take a look here and let me know what you find:
Open your current Firefox settings (AKA Firefox profile) folder using either
"3-bar" menu button > "?" button > Troubleshooting Information
(menu bar) Help > Troubleshooting Information
type or paste about:support in the address bar and press Enter
In the first table on the page, click the "Show Folder" button.
In your profile folder, scroll down and double-click into the sessionstore-backups folder. You may see numerous files here. Of particular importance:
recovery.js: the windows and tabs in your currently live Firefox session -- if you check the modified date/time, is this fresh or is it from the time frame that keeps coming back?
recovery.bak: a backup copy of recovery.js
previous.js: the windows and tabs in your last Firefox session
upgrade.js-build_id: the windows and tabs in the Firefox session that was live at the time of your last update
Do you see any numbered files, such as recovery-1.js? Firefox may create those when it is unable to store your current session history in recovery.js. Unfortunately, at the next startup, those files are not used automatically.
Open your current Firefox settings (AKA Firefox profile) folder using either
"3-bar" menu button > "?" button > Troubleshooting Information (menu bar) Help > Troubleshooting Information type or paste about:support in the address bar and press Enter In the first table on the page, click the "Show Folder" button.
In your profile folder, scroll down and double-click into the sessionstore-backups folder. You may see numerous files here. Of particular importance:
recovery.js: the windows and tabs in your currently live Firefox session -- if you check the modified date/time, is this fresh or is it from the time frame that keeps coming back? recovery.bak: a backup copy of recovery.js previous.js: the windows and tabs in your last Firefox session upgrade.js-build_id: the windows and tabs in the Firefox session that was live at the time of your last update Do you see any numbered files, such as recovery-1.js? Firefox may create those when it is unable to store your current session history in recovery.js. Unfortunately, at the next startup, those files are not used automatically.
Note: By default, Windows hides the .js extension. To ensure that you are looking at the files I mentioned, you may want to turn off that feature. This article has the steps: http://windows.microsoft.com/en-us/windows/show-hide-file-na...
source:https://www.luxecalendar.com/