Toggle mod for WideChests mod. Having this mod enabled together with WideChests removes width/height/area limits. Can increases memory usage and loading time significantly (depending on your mod settings).
The mod is probably downloaded in "C:\Users\<your username>\AppData\Roaming\Factorio\mods\" or equivalent on other operating systems. You can just delete it there or edit "mod-list.json" file and disable it there.
