diff -Nru firefox-62.0+build2/debian/changelog firefox-62.0+build2/debian/changelog
--- firefox-62.0+build2/debian/changelog	2018-09-12 00:36:32.000000000 +0000
+++ firefox-62.0+build2/debian/changelog	2018-09-13 16:37:16.000000000 +0000
@@ -1,3 +1,12 @@
+firefox (62.0+build2-0ubuntu0.14.04.5) trusty-security; urgency=medium
+
+  * Final part of the fix for LP: #1791789: Cleanup extra Amazon.com
+    search engine in locales that have their own Amazon search engine
+    - add debian/patches/cleanup-old-distribution-search-engines.patch
+    - update debian/patches/series
+
+ -- Chris Coulson <chris.coulson@canonical.com>  Thu, 13 Sep 2018 17:37:16 +0100
+
 firefox (62.0+build2-0ubuntu0.14.04.4) trusty-security; urgency=medium
 
   * Fix LP: #1791789: Mark distribution search engines as read-only, so that
diff -Nru firefox-62.0+build2/debian/patches/cleanup-old-distribution-search-engines.patch firefox-62.0+build2/debian/patches/cleanup-old-distribution-search-engines.patch
--- firefox-62.0+build2/debian/patches/cleanup-old-distribution-search-engines.patch	1970-01-01 00:00:00.000000000 +0000
+++ firefox-62.0+build2/debian/patches/cleanup-old-distribution-search-engines.patch	2018-09-13 16:37:16.000000000 +0000
@@ -0,0 +1,28 @@
+Description: Cleanup after LP: #1791789. This bug resulted in some en-US
+ distribution search engines (specifically Amazon.com) enabled for non en-US
+ users. This should have normally been cleaned up on upgrade because
+ SearchService.prototype._loadEnginesFromCache skips read-only engines when
+ rebuilding the cache, but prior to that bug being fixed, distribution search
+ engines were not marked as read-only.
+ .
+ This is a temporary fix to clean up profiles for users who upgraded to the
+ initial 60.0 release. It can be dropped at some point in the future.
+Author: Chris Coulson <chris.coulson@canonical.com>
+Forwarded: not-needed
+
+--- a/toolkit/components/search/nsSearchService.js
++++ b/toolkit/components/search/nsSearchService.js
+@@ -3236,6 +3236,13 @@
+         continue;
+       }
+ 
++      // Temporary cleanup for https://launchpad.net/bugs/1791789 - distribution
++      // engines prior to this update were not marked as read only
++      if (skipReadOnly && /^(\[distribution\])/.test(engine._loadPath)) {
++        ++skippedEngines;
++        continue;
++      }
++
+       this._loadEngineFromCache(engine);
+     }
+ 
diff -Nru firefox-62.0+build2/debian/patches/series firefox-62.0+build2/debian/patches/series
--- firefox-62.0+build2/debian/patches/series	2018-09-12 00:36:32.000000000 +0000
+++ firefox-62.0+build2/debian/patches/series	2018-09-13 16:37:16.000000000 +0000
@@ -29,3 +29,4 @@
 mark-distribution-search-engines-as-read-only.patch
 search-service-dont-handle-locale-changes-on-shutdown.patch
 drop-check-glibc-symbols.patch
+cleanup-old-distribution-search-engines.patch