The permissions History Disabler requires on install are declared in the manifest.
"permissions": [ "browsingData", "history", "downloads", "storage", "tabs" ]
Each permission is required for the reasons set out below.
To clear all history on browser start-up.
history and tabs
To remove history items as their corresponding tabs are closed, or immediately depending on configuration.
downloads (Since 1.5)
To clear download history when a download has completed, or has been interrupted. This functionality is optional.
storage (Since 1.5)
To save and access extension options.