I haven't found any issue's after latest updates this week.  Windows 11 here.

W10 Dec updates, no issues here

Flint 1760
May be a dumb question on my part, but are you on Firefox 95.0?

Yes 95.01

 
January 11, 2022—KB5009543 (OS Builds 19042.1466, 19043.1466, and 19044.1466) Cumulative Update.
 
 
January 11, 2022—KB5009543 (OS Builds 19042.1466, 19043.1466, and 19044.1466) (microsoft.com)
 
 
 
January 11, 2022-KB5008876 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2
 
 
January 11, 2022-KB5008876 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2 (microsoft.com)
 
 
 
Remove specific prevalent malware with Windows Malicious Software Removal Tool - KB890830
 
 
Remove specific prevalent malware with Windows Malicious Software Removal Tool (KB890830) (microsoft.com)
 
 
 
 
 
(No problems to report.)

Windows 10 Pro 19044.1466 
 
Windows 11 Pro  22000.434  

no issues to report, after updating several machines with latest W10 21H1 updates

Cool GTX
no issues to report, after updating several machines with latest W10 21H1 updates

+1.  Same here along with one Win11 system.  All good.

 
Optional Quality Update - January 17, 2022—KB5010793 (OS Builds 19042.1469, 19043.1469, and 19044.1469) Out-of-band.
 
 
January 17, 2022—KB5010793 (OS Builds 19042.1469, 19043.1469, and 19044.1469) Out-of-band (microsoft.com)
 
 
 
Highlights

• Updates a known issue that affects VPN connections. 
  
• Updates a known issue that causes unexpected restarts on Windows Server domain controllers.
  

 
 
 
 
No problems thus far.

Win 11 Pro 21H2 (22000.438)   Good
Win 10 Pro 21H2 (190944.1469)  Good
 
 

 
January 25, 2022-KB5009467 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 20H2, Windows Server, version 20H2, Windows 10 Version 21H1, and Windows 10 Version 21H2
 
 
https://support.microsoft.com/en-us/topic/january-25-2022-kb5009467-cumulative-update-preview-for-net-framework-3-5-and-4-8-for-windows-10-version-20h2-windows-server-version-20h2-windows-10-version-21h1-and-windows-10-version-21h2-a43a0b41-7d2d-42a5-9f3e-edd58ad6fa32
 
 
 
January 25, 2022 Cumulative Update - KB5009596 (OS Builds 19042.1503, 19043.1503, and 19044.1503) Preview
 
 
 
Highlights:

• ​​​​​​Adds a reminder to Internet Explorer 11 that notifies you about its upcoming retirement.
  
• Updates an issue that might sometimes cause Japanese Microsoft Office applications stop working when you use the new Japanese Input Method Editor (IME).
  
• Updates an issue that stops printing or prints the wrong output when you print using USB on Windows 10, version 2004 or later.
  
• Updates an issue that causes applications to stop working when you type text using the Chinese IME.
  
• Updates an issue that prevents certain surround sound audio from playing in Microsoft Edge.
  
• Adds a new feature that provides direct access to select your Microsoft Edge profiles from news and interests. You can also go to Microsoft Edge directly from news and interests in the same corresponding profile.
  
• Adds a new feature called Sync Your Settings for users who are migrating to Windows 11, original release. You’ll use Sync Your Settings to automatically back up a list of your applications to your Microsoft Account. Then, you can quickly restore those application on a Windows 11, original release device. This new feature that will deploy over the coming weeks.
  
• Updates an issue that causes functioning Bluetooth devices to stop working when you attempt to connect to a non-functioning Bluetooth device.
  
• Updates daylight savings time to start in February 2022 instead of March 2022 in Jordan.
  
• Updates the phone number for Windows Activation for locales that have the wrong phone number.

 

January 25, 2022—KB5009596 (OS Builds 19042.1503, 19043.1503, and 19044.1503) Preview (microsoft.com)
 
 
 
 
No problems so far.