= Enabling Fission =
[[File:Fission tab tooltip.png|thumb|A "[F]" in a loaded tab's tooltip indicates that Fission is enabled]]
Fission is still in active development, and can only be enabled in Firefox Nightly.
How to enable Fission:
# Enable the ''"fission.autostart"'' pref in Nightly using ''about:config''. No need to mess with any other ''"fission.*"'' prefs.
# Restart Nightly.
You can verify that Fission should now be has been enabledby hovering over a loaded tab. To verify it's enabled, load a webpage, hover over If the tab, looking for tooltip contains a "[F]" (i.e, Fission is enabled. === Disabling Fission) in the tab's tooltip popup=== [[File:New_non_fission_window3.png|thumb|Opening a new non-fission window]]
If you encounter an issue while using Fission, it is possible to open a non-fission window within the same browsing session using the "New Non-Fission Window" item in the hamburger menu. This can be useful to determine if issues are Fission-specific, or to work around fission-specific breakage.
In general, avoid modifying other ''"fission.*"'' prefs, as they are often for testing, or unstable features very early in development, and aren't ready to be used for day-to-day browsing. To disable Fissioncompletely, reset the ''"fission.autostart"'' pref back to ''"false"'' and restart Nightly.
= Milestones =