Yes it can. but you need to reset to accept cookies again if want to save another cookie.

My settings after deleting all cookies I do not want are : Options --> History Use Custom Settings for History Uncheck - if checked Always use Private Browsing Remember My Browsing and Download History (Optional) Remember Search & Form History (Optional) Check - Accept Cookies from Websites Check - Accept third party Cookies Keep until I close Firefox Uncheck Clear History when Firefox Closes

Please let us know if this solved your issue or if need further assistance.

Let the Cookies expire when Firefox is closed to make them session Cookies instead of using "Clear history when Firefox closes" to clear the Cookies.

• Options/Preferences -> Privacy & Security -> "Use custom settings for history" -> cookies: Keep until: "I close Firefox"

You can create an "Allow" exception to keep specific Cookies.

In case you use "Clear history when Firefox closes" or otherwise clear history.

• do not clear the cookies
• do not clear the Site Preferences

• Options/Preferences -> Privacy & Security -> Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" -> Settings
• https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox

• clearing "Site Preferences" clears exceptions for Cookies, images, pop-up windows, and software installation and exception for password and other website specific data
• clearing "cookies" will remove all selected Cookies including Cookies with an "Allow" exception you may want to keep