Here are the Details of Slither.io Hack Extension
Slither.io hack extension is one of the things that slither.io players usually prefer when they want to play slither.io. They do not affect the slither.io gameplay, however, they offer you various slither.io hacks that you can use while you are playing the slither.io game. When you download slither.io mods, you will also download slither.io hack extensions together with the slither.io private servers. In this way, you will automatically have an access to all slither.io cheats which are offered by that server.
But you need to keep in mind that, any of the slither.io players who will play the game on that server will have an access to the same slither.io hacks. These hacks may vary depending on the server, however, some of the most preferred and common hacks are slither.io zoom hack, slither.io skin changer, slither.io bots and free slither.io skins. However, you still need to read the slither.io mod reviews in order to learn which slither.io hacks are offered on that server. Otherwise, you may download slither.io mods which you will never want to play.
Make sure you disable any other slither.io extension and scripts first!
How to install user scripts?
Firefox and related browsers: Greasemonkey.
Google Chrome, Chromium, and related browsers: Tampermonkey.
Opera (version 15 and later): Tampermonkey or Violentmonkey.
Opera version 12 and earlier supports user scripts natively. Violentmonkey provides a friendlier UI and better compatibility.