Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection

Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?

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}

Firefox 95.0.2 is too slow opening my home page "msn.com". Computer has had major cleaning and hard disk checking and reinstall of Windows 10 plus Win 10 In Place Upgrade with very little improvement. Is Microsoft trying to force us to use Edge? Any help would be appreciated.

Is it just msn.com or any site?

Just msn.com, as gmail and yahoo mail load fast.

Delete browsing, search and download history on Firefox {web link}

Remove a single website from your history {web link}

Open the History Manager <Control> (Mac=<Command>) <Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any site settings And Passwords.

Should I remove msn.com from history?

I removed all history except cookies as I already tried removing cookies. I also shut off hardware acceleration and I am definitely loading msn.com much faster.