I recently noticed that when I open a Firefox Browser, at the top, where it says "Mozilla Firefox" it is followed by this: (Build 2097109189239018) Those are not the actual numbers, but that is what it looks like - Parenthesis with the word "Build" followed by a series of numbers and then the end parenthesis. I would like to get rid of this please. I don't want to see it. What is it first of all? Why is it suddenly appearing in my browser bar? And HOW can I get rid of it once and for all? Thank you!