SOLVED - Forum Not Working on Firefox

I have now tried to sign into the forum on two different Macs running Firefox. When I enter my user name and password the forum ignores them and takes me back to browsing as if not logged in. I can't comment on anything or see if I have notifications. However, when I click the Kemper amps homepage icon it turns out that I have been signed in properly to all other services such as Rig Exchange.

If I use Safari everything works as normal. There is clearly some setting in Firefox that I need to change or there is something in the Forum software that hasn't been tested on Firefox and needs updated.

Anyone else experiencing this?

OK thanks.

Will try that.

Thanks guys. I just tried clearing cache only but it didn't work. So I went nuclear and cleared everything , history, cookies, search history, cache the work. Closed Firefox and reopened it. Everything working fine now.