diff --git a/build/mozconfig.common b/build/mozconfig.common
index 3d2d0b289..1bdf69ddc 100644
--- a/build/mozconfig.common
+++ b/build/mozconfig.common
@@ -16,11 +16,6 @@ ac_add_options --enable-crashreporter
 
 ac_add_options --enable-release
 
-# Disable checking that add-ons are signed by the trusted root
-MOZ_ADDON_SIGNING=${MOZ_ADDON_SIGNING-0}
-# Disable enforcing that add-ons are signed by the trusted root
-MOZ_REQUIRE_SIGNING=${MOZ_REQUIRE_SIGNING-0}
-
 ac_add_options --enable-js-shell
 
 . "$topsrcdir/build/mozconfig.automation"
diff --git a/old-configure.in b/old-configure.in
index 765a31f16..fd86939b9 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -4929,15 +4929,6 @@ AC_SUBST(MOZ_FIX_LINK_PATHS)
 AC_SUBST(MOZ_POST_PROGRAM_COMMAND)
 AC_SUBST(MOZ_LINKER_EXTRACT)
 
-AC_SUBST(MOZ_ADDON_SIGNING)
-if test "$MOZ_ADDON_SIGNING" = 1; then
-  AC_DEFINE(MOZ_ADDON_SIGNING)
-fi
-AC_SUBST(MOZ_REQUIRE_SIGNING)
-if test "$MOZ_REQUIRE_SIGNING" = 1; then
-  AC_DEFINE(MOZ_REQUIRE_SIGNING)
-fi
-
 AC_SUBST(MOZ_JSDOWNLOADS)
 if test -n "$MOZ_JSDOWNLOADS"; then
   AC_DEFINE(MOZ_JSDOWNLOADS)
diff --git a/python/mozbuild/mozbuild/mozinfo.py b/python/mozbuild/mozbuild/mozinfo.py
index 230ca119a..3bdde249c 100644
--- a/python/mozbuild/mozbuild/mozinfo.py
+++ b/python/mozbuild/mozbuild/mozinfo.py
@@ -88,8 +88,6 @@ def build_dict(config, env=os.environ):
     d['telemetry'] = substs.get('MOZ_TELEMETRY_REPORTING') == '1'
     d['tests_enabled'] = substs.get('ENABLE_TESTS') == "1"
     d['bin_suffix'] = substs.get('BIN_SUFFIX', '')
-    d['addon_signing'] = substs.get('MOZ_ADDON_SIGNING') == '1'
-    d['require_signing'] = substs.get('MOZ_REQUIRE_SIGNING') == '1'
     d['official'] = bool(substs.get('MC_OFFICIAL'))
 
     def guess_platform():
diff --git a/toolkit/modules/AppConstants.jsm b/toolkit/modules/AppConstants.jsm
index 40aaadbf0..5eea04b0f 100644
--- a/toolkit/modules/AppConstants.jsm
+++ b/toolkit/modules/AppConstants.jsm
@@ -194,13 +194,6 @@ MOZ_SAFE_BROWSING:
   false,
 #endif
 
-  MOZ_REQUIRE_SIGNING:
-#ifdef MOZ_REQUIRE_SIGNING
-  true,
-#else
-  false,
-#endif
-
   MENUBAR_CAN_AUTOHIDE:
 #ifdef MENUBAR_CAN_AUTOHIDE
   true,