Hello,

Try Clearing Cookies and Sites Data in your browser:-

• Click the menu button. and select Options. Preferences.
• Select the Privacy & Security panel and go to the Cookies and Site Data section.
• Click the Clear Data… button. The Clear Data dialog will appear. ...
• Click Clear.

If it doesn't works, then try opening in safe mode, maybe some extensions would be the reason of your problem,

Try opening firefox in Safe mode,

• Find the Firefox icon or click Start and type Firefox.
• Hold down the Shift key on the keyboard and then click the Firefox icon.
• In the Firefox Safe Mode window, click the Start in Safe Mode option.

Hope it works. Thank You.

Hi uk-ff, please ignore the spam message with a phone number -- that's not official and we don't know what they will do to your system if you engage.

Thanks very much for the hint! Appreciated a lot...