Bug 1457929 - Enable container-based segregation of newtab thumbnails on all channels. r=tanvi, a=RyanVM

MozReview-Commit-ID: IpNBIWu2fXh

--HG--
extra : source : e0d9fa7008148d25f9c880d9f0f85a0992d0d540

browser/app/profile/firefox.js

@@ -1506,18 +1506,18 @@ pref("privacy.trackingprotection.ui.enabled", true);
 pref("privacy.trackingprotection.introCount", 0);
 pref("privacy.trackingprotection.introURL", "https://www.mozilla.org/%LOCALE%/firefox/%VERSION%/tracking-protection/start/");
 
+// Always enable newtab segregation using containers
+pref("privacy.usercontext.about_newtab_segregation.enabled", true);
 // Enable Contextual Identity Containers
 #ifdef NIGHTLY_BUILD
 pref("privacy.userContext.enabled", true);
 pref("privacy.userContext.ui.enabled", true);
-pref("privacy.usercontext.about_newtab_segregation.enabled", true);
 
 // 0 disables long press, 1 when clicked, the menu is shown, 2 the menu is shown after X milliseconds.
 pref("privacy.userContext.longPressBehavior", 2);
 #else
 pref("privacy.userContext.enabled", false);
 pref("privacy.userContext.ui.enabled", false);
-pref("privacy.usercontext.about_newtab_segregation.enabled", false);
 
 // 0 disables long press, 1 when clicked, the menu is shown, 2 the menu is shown after X milliseconds.
 pref("privacy.userContext.longPressBehavior", 0);