Microsoft .NET Framework Assistant 1.0

Hello,
I asked this question on another forum and I received one answer, but I am still lost as to what this does and how it applies to me.
After installing Microsoft’s priority update for the .net framework 3.5, I noticed that when I opened Firefox, it informed me an add-on was installed. When I looked, I saw the following:
Microsoft .NET Framework Assistant 1.0
I have been unable to get a clear description of what this is or what it does.
Anyone have any idea exactly what this does?
Should I leave this alone or disable it?
Am I just being paranoid?

This is on a single system and the .net framework is required for a CAD program that I run.
Thank you for any help on this.

 

Thank you JRViejo for answering my question.

I do not have a lot of knowledge when it comes to issues like this. I have read that the ClickOnce Application’s can be a security risk, but that there are no issues at this time. But I also know that anyone with an opinion can write something on the internet. I even ran across one forum that the general opinion was that removing this could also cause a security risk.
For now I will leave this alone and try to monitor this for security issues.
Thank you again for taking the time to answer this for me.