Visualizer performance issue on Firefox add-on.

[sekidelo]

I’ve noticed a performance issue with the visualizers on the Firefox version of the add-on. The extension works flawlessly overall, but there’s a visual bug that causes the visualizers to lag or appear slowed down (as if they’re running at a lower frame rate).
When playing any song, the visualizers are noticeably slower. However, if I pause and unpause the song, the visualizers run smoothly again. The issue reappears when skipping to a different part of the track using the progress bar.

This bug only occurs on Firefox. Maybe the problem is something on my own. I tested the extension on Chrome and it worked perfect.