Hello,

The file's format is SVG, which stays for Scalable Vector Graphics, a vector graphics format for defining two-dimensional graphics. Its specification is an open standard developed by W3C, not Mozilla. Actually, the file doesn't seem to be connected to Firefox (you see the "Firefox HTML Document" prompt just because Firefox is probably set as a default application for opening this file format). If you believe you have never intentionally downloaded it, feel free to delete the file. Anyway, it first goes to the Recycle Bin, so you'll be able to restore it in case of any troubles.

Thanks. Yes, it dawned on me that it was only Firefox because that's my default browser. Don't have no idea why this file showed up on my desktop, but from what you say I will go ahead and delete it. I get nervous when something unknown goes on with my computer. I appreciate your quick response! Julie