Install Slither.io Mods for Mozilla Firefox, Opera, Safari and related browser. Install mods with Tampermonkey extension and add-on Greasemonkey.

Play slither.io now!

Update Logs

UPDATE: Add-0n for Firefox is avalible at here.

Version 2.1.9 updated:

  • Add Wannacry skin.
Slither.io Wannacry

Version 2.1.5

  • Add Team Chat (chat with players who use PartyCode same like your PartyCode)
Slither.io Party Chat

Version 2.1.3

  • Party Code updated: select code from the list.
Slither.io Version 2.1.3

Version 2.1.1

  • Features [Partycode] is back.

Install Slither.io Mods on Firefox and related browser

UPDATE: Add-0n for Firefox is avalible at here.

Step 1

Step 2

  • Click here or link at the end post to download user scripts.

Step 3

  • For Tampermonkey:
  • For Greasemonkey: Greasemonkey will call you up to select Install button, just click it when you are asked so that you can confirm this installation on Firefox. Click Install

Step 4

button
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