First of all, I extend my thanks to anyone who can help me and my apologies in case this is the wrong part of the site to ask for help.

I have been playing Killer Instinct for the SNES. I decided I would like to compete for the high score and submit my score via screenshot. Unfortunately, when I click the link that says "Click Here to Compete for Highscore," the emulator window that it brings up responds to neither my keyboard nor my gamepad. I tried pressing escape to configure it, but pressing escape had no effect. Additionally, the game's sound was slightly distorted.

I disabled my ad-blocker to no avail, and I am using an up-to-date Firefox browser on Windows 8. I am unsure of how to fix these problems and I didn't find anything helpful in the FAQ. I appreciate any help that you can offer me. Thank you very much.

UPDATE: I have the exact same problems when I try to use Mednafen to record my gameplay. I believe Mednafen is the issue. Has anyone else had problems with this, or does anyone know how I can fix it?

UPDATE 2: Double-clicking on the window (rather than pressing escape, as the instructions indicate) allows me to configure the controls in Mednafen and play the game. Unfortunately, the sound is still distorted.

Can you provide us with a link to the game you are trying?
I would like to test it myself.

Also, in highscore mode, Mednafen is used and regularly ZSNES is used.
For ZSNES, esc opens the menu and double-click reconfigs in Mednafen.
Its most likely just a typo since the main emulator is ZSNES.

Mednafen will most likely have sound problems for SNES games. It's not fixable with the current RGR Plugin unfortunately.

Have you only been using Firefox, and Firefox only? Have you attempted to use chrome? Cause I have sound distortions
with some games and I use chrome and I don't have the issue but I mean if you've tried.

tRIUNE is more than likely correct.

Sorry about the bad luck, hope it gets fixed for you one day!