I looked into this yesterday and got it partially working but I didn't finish. I used
Fast Explorer 2008 and created a new menu item for All Files, changed name to "Search Google...", and pointed it to Firefox.exe. I used "
https://www.google.com/search?q=%1" as the parameter.
It worked, but the problem I ran into was that it was sending the full path and filename as the parameter. So instead of searching just for the filename (Song.mp3), it would send the full path to Google (C:\Users\Gardenman\Desktop\Song.mp3).
I gave up early, but it could be done with a batch file that removes the path and keeps only the filename.
This would not search the ID3 tag as Alabalacho said, just search for the filename. If interested in doing that (search for filename only), let me know and I'll
finish it up and let you know how I did it.
Tip: Don't forget to restart Windows Explorer after adding an option to make it show up.