Hi,
Thank you for your question. It sounds like you may be seeing the result of a known issue in respect of X-Mouse Button Control software on your computer.
This is something that we are aware of and have communicated to the developer of X-Mouse Button Control. They are currently testing a solution to this and we hope they can make it more widely available soon.
For more information, please see the X-Mouse Button Control in Firefox 110 support article.
