diff --git a/browser/branding/aurora/pref/firefox-branding.js b/browser/branding/aurora/pref/firefox-branding.js
index 26aa01729b7..06910be66b0 100644
--- a/browser/branding/aurora/pref/firefox-branding.js
+++ b/browser/branding/aurora/pref/firefox-branding.js
@@ -11,7 +11,8 @@ pref("startup.homepage_welcome_url","");
 pref("app.update.interval", 28800); // 8 hours
 // The time interval between the downloading of mar file chunks in the
 // background (in seconds)
-pref("app.update.download.backgroundInterval", 60);
+// 0 means "download everything at once"
+pref("app.update.download.backgroundInterval", 0);
 // Give the user x seconds to react before showing the big UI. default=24 hours
 pref("app.update.promptWaitTime", 86400);
 // URL user can browse to manually if for some reason all update installation
diff --git a/browser/branding/nightly/pref/firefox-branding.js b/browser/branding/nightly/pref/firefox-branding.js
index 4dfa3de86f1..af23d59c7e5 100644
--- a/browser/branding/nightly/pref/firefox-branding.js
+++ b/browser/branding/nightly/pref/firefox-branding.js
@@ -8,7 +8,8 @@ pref("startup.homepage_welcome_url", "https://www.mozilla.org/projects/firefox/%
 pref("app.update.interval", 7200); // 2 hours
 // The time interval between the downloading of mar file chunks in the
 // background (in seconds)
-pref("app.update.download.backgroundInterval", 60);
+// 0 means "download everything at once"
+pref("app.update.download.backgroundInterval", 0);
 // Give the user x seconds to react before showing the big UI. default=12 hours
 pref("app.update.promptWaitTime", 43200);
 // URL user can browse to manually if for some reason all update installation