-> click Firefox button and click Options -> Privacy -> History section -> Firefox will: select "Use Custom Settings for History" -> REMOVE Checkmark from Permanent Private Browsing mode -> place Checkmarks on:

• Remember my Browsing History
• Remember Download History
• Remember Search and Form History
• Accept Cookies from sites -> click Exceptions... button and click Remove All button
• Clear History when Firefox closes -> click Settings... button -> select the options you want -> click OK

-> click OK on Options window -> Restart Firefox

Check and tell if its working.

Manually Clear Cookies & Cache

• https://support.mozilla.com/en-US/kb/Template:clearCookiesCache

Doesn't work

-> click Firefox button and click Options -> Privacy -> History section -> Firefox will: select "Use Custom Settings for History" -> REMOVE Checkmark from Permanent Private Browsing mode -> place Checkmarks on:

• Remember my Browsing History
• Remember Download History
• Remember Search and Form History
• Accept Cookies from sites -> click Exceptions... button and click Remove All button
• Accept Third-party Cookies -> under Keep Until: select I Close Firefox

-> click OK on Options window -> Restart Firefox

Check and tell if its working.

I already tried that and it doesn't work either.

Do you have an extension like TACO (Abine) or TrackerBlock that maintains a set of OPT-OUT cookies?

• https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Start Firefox in Use Troubleshoot Mode in Firefox to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.com/kb/Safe+Mode