Slither.io Zoom Mod by Xera

The Extension includes a zoom mod, custom backgrounds, and many other improvements!
Once installed, open slither.io and have fun :)

Tip: Press TAB to hide the UI
You can view the source code on Github!

If your framerate feels capped, that's Firefox's default configuration. To fix it:
1. Open about:config and accept the warning
2. Search for layout.frame_rate
3. Set it to your monitor's refresh rate in Hz (-1 is automatic, but unreliable)