How to change YOUR author name for filter?

Sorry, but I'm new here and could not think of a better way to ask this.
What I would like to do is change the "By" name for a filter I made... like where it say who the filter was made by...
I'm on a Mac and FF is naming the author after the name of my USER folder... instead of that I'd like it to name it by my screen name over here (McGyver)... is there some preference or something that will allow that?
Or when I go to submit the filter will I be able to change the name then (I don't actually care what it says on MY screen)...
I do not want to change the USER folder name on my Mac.
Sorry if I've worded this is a stupid manner, but I hope you get my idea. I looked around to see if I could find an answer to this first, but did not notice one, so sorry also if there is an obvious answer to this question.
Thanks in advance for any answer or help you can give and sorry if I do not respond for a day or two, I'm about to enjoy a nice old hurricane and I don't know if the power will go out for any amount of time.
Thanks, and if you are also in the hurricane's path... Good luck and stay safe!

Awesome! Thank you Kraellin!! It worked just as you said... I don't know how I missed that, I must of been looking right at that... like five or more times and it did not register in my brain... I suppose that is Reason #32 for why you should choose a brand name brain from a reputable manufacturer when purchasing used brains!

Hi, I'd like to do the opposite. I wrote my real name in my local file, but during upload it was changed to my screen name. Which makes kind of sense, I guess, to prevent confusion on the forums. For future uploads I'd like to be able to keep the name from my local files, though. Is that possible, or did I do something wrong, perhaps?
I could always add additional names to the description itself, I guess.