Changes

Although the Gecko platform supports multiple processes, the Firefox frontend is not designed to use them. Work to make the frontend (including addons) support multiple processes was begun in early 2013. The [[Electrolysis/Roadmap|project roadmap]] has more details.

To enable or disable e10s, open Nightly's Preferences and check the "Enable E10S" checkbox. You will need to restart Nightly. Alternately, you can also toggle the ''browser.tabs.remote'' and ''browser.tabs.remote.autostart'' prefs to enable (true) or disable (false) e10s.