==Enabling and Disabling Electrolysis==
To enable or disable e10s, open Preferences and check the "Enable E10Smulti-process" checkbox and then restart your browser.
[[File:NightlyPreferencesE10s.png|324x150px|frameless|Nightly > Preferences > General > Enable E10s]]
If your browser breaks in a way that you can't easily recover to change this setting, you can start Firefox in Safe Mode (by holding Alt/Option during start) which will force-disable e10s and should allow you to enter the Preferences dialog and untick the checkbox.
== What to Expect ==