I'm using the ZSNES emulator in-browser (with fully updated Chrome), to play the first Final Fight. But it isn't going well.

First there is the over all slowdown occurring. The game drags in many places, especially when there's a lot of action on screen.

Then there's the dip in framerate. A lot of the time, the characters on screen jump forward or back in an erratic fashion. They stutter, and animations do not play correctly.

Finally, the sound is very sub-par. Sometimes the music does not play at the correct tempo. Same with the sound effects.

My question is: What's wrong? lol
I have a good, dependable PC (running Windows 10 64 bit.) I've played other games here on Vizzed without these problems. And as far as I know, the SNES port of Final Fight shouldn't have all these problems.

JCvgluvr : Chrome is a RAM hog.. there's not much you can do except switch browsers to something low-use like IE or Firefox. Don't get opera, opera is a ram hog as well..

If that doesn't work, then it's either an issue with the particular port of the game or we need to use Mednafen (though that requires a beefy computer in my experience, might lag)

ZSNES isn't all that reliable of an emulator.. hopefully we can get SNES9X soon.

That's too bad. I guess I'll have to finish the game on Chrome, While sub-par, it isn't like it's unplayable.

Then I'll play everything else on Firefox from now on. (I also wouldn't mind using Mednafen, I've done that before.) Thanks for the help.

Firefox initially might use less RAM (a matter of about 30 megabytes or so... not a big deal IMO), but Chrome doesn't have the same memory leaks.
Besides, Firefox has security issues... 
And Opera actually uses the least amount of RAM, but Operalol

Instead of ZSNES, have you tried Mednafen?

First, I beat the game in ZNES on Chrome, because my save state was there.

Then I started a new game on Firefox with ZNES. I ran into several new problems. Controller input wasn't working. Sometimes even the keyboard.

So I switched to Mednafen on Firefox. The game performed well, with no issues. But some things are strange. For instance, the game window was seemingly tied to my desktop background wallpaper slideshow. I had to increase the slideshow time, just so I could play properly.

Having figured that out, I opened Chrome back up, and tried Mednafen on there. Again, it performed well, with no issues. I ran into a couple problems with fullscreen functionality, though. It was like once I made the game fullscreen, it wouldn't shrink back down. I had to use the windows button, and close the window manually, just so I could exit the game. I was also unable to access the F1 menu, once I went to fullscreen.

In any case, ZNES seems to be the culprit, and not the browser. It's strange to me. I have played well over a dozen SNES games here on Vizzed using ZNES. It's only now that it has stopped performing well. It doesn't matter to me, I guess. I don't have a problem using Mednafen from now on. I would like it to stop being tied to my desktop wallpaper, because that's bizarre. I also don't enjoy the fullscreen issues. But...at least it performs well!

For older games, I use NES flashbox emulator. It works well and is a cheap option just in case the plugin doesn't work.