Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

Also, in case an old bookmark or link is not redirecting to the current site, could you try starting from this URL and see whether it is properly styled/functional:

https://outlook.live.com/owa/

Tried both of these suggestions, did not work.

This issue started after i deleted the cache, cookies and history!

Welcome to the world of obsolescence.
For years, Microsoft has been moving Hotmail users over to Outlook.

Apparently you should still be able to login using your old hotmail id. Check out this link on the Microsoft website. https://answers.microsoft.com/en-us/outlook_com/forum/all/how-do-i-change-my-hotmailcom-email-address-to/164cd5ca-055c-4ff2-b415-bd5b00da6d7b

My previous reply was sent to moderation as it has an outside link - Microsoft. When it finally gets approved, there is not an automatic email notification.
This post will trigger the email.