diff --git a/application/basilisk/components/nsBrowserGlue.js b/application/basilisk/components/nsBrowserGlue.js
index 7534eb6b7..4147b4a33 100644
--- a/application/basilisk/components/nsBrowserGlue.js
+++ b/application/basilisk/components/nsBrowserGlue.js
@@ -1041,12 +1041,7 @@ BrowserGlue.prototype = {
       });
     }
 
-    let signingRequired;
-    if (AppConstants.MOZ_REQUIRE_SIGNING) {
-      signingRequired = true;
-    } else {
-      signingRequired = Services.prefs.getBoolPref("xpinstall.signatures.required");
-    }
+    let signingRequired = Services.prefs.getBoolPref("xpinstall.signatures.required");
 
     if (signingRequired) {
       let disabledAddons = AddonManager.getStartupChanges(AddonManager.STARTUP_CHANGE_DISABLED);
diff --git a/application/basilisk/confvars.sh b/application/basilisk/confvars.sh
index cb97e5127..a942d1e1f 100644
--- a/application/basilisk/confvars.sh
+++ b/application/basilisk/confvars.sh
@@ -53,7 +53,3 @@ if test "$OS_ARCH" = "WINNT" -o \
         "$OS_ARCH" = "Darwin"; then
   MOZ_CAN_DRAW_IN_TITLEBAR=1
 fi
-
-# Disable checking that add-ons are signed by the trusted root
-MOZ_ADDON_SIGNING=0
-MOZ_REQUIRE_SIGNING=0
diff --git a/toolkit/mozapps/webextensions/content/extensions.js b/toolkit/mozapps/webextensions/content/extensions.js
index 807af2e6f..1f24682ec 100644
--- a/toolkit/mozapps/webextensions/content/extensions.js
+++ b/toolkit/mozapps/webextensions/content/extensions.js
@@ -2674,24 +2674,6 @@ var gListView = {
       }
     }, false);
 
-    document.getElementById("signing-learn-more").setAttribute("href",
-      Services.urlFormatter.formatURLPref("app.support.baseURL") + "unsigned-addons");
-
-    let findSignedAddonsLink = document.getElementById("find-alternative-addons");
-    try {
-      findSignedAddonsLink.setAttribute("href",
-        Services.urlFormatter.formatURLPref("extensions.getAddons.link.url"));
-    } catch (e) {
-      findSignedAddonsLink.classList.remove("text-link");
-    }
-
-    try {
-      document.getElementById("signing-dev-manual-link").setAttribute("href",
-        Services.prefs.getCharPref("xpinstall.signatures.devInfoURL"));
-    } catch (e) {
-      document.getElementById("signing-dev-info").hidden = true;
-    }
-
     // To-Do: remove deprecation notice content.
     document.getElementById("plugindeprecation-notice").hidden = true;
   },
diff --git a/toolkit/mozapps/webextensions/content/extensions.xul b/toolkit/mozapps/webextensions/content/extensions.xul
index 70939d024..62cecd87c 100644
--- a/toolkit/mozapps/webextensions/content/extensions.xul
+++ b/toolkit/mozapps/webextensions/content/extensions.xul
@@ -342,17 +342,6 @@
 
             <!-- list view -->
             <vbox id="list-view" flex="1" class="view-pane" align="stretch" tabindex="0">
-              <!-- info UI for add-ons that have been disabled for being unsigned -->
-              <vbox id="disabled-unsigned-addons-info" hidden="true">
-                <label id="disabled-unsigned-addons-heading" value="&disabledUnsigned.heading;"/>
-                <description>
-                  &disabledUnsigned.description.start;<label class="text-link plain" id="find-alternative-addons">&disabledUnsigned.description.findAddonsLink;</label>&disabledUnsigned.description.end;
-                </description>
-                <hbox pack="start"><label class="text-link" id="signing-learn-more">&disabledUnsigned.learnMore;</label></hbox>
-                <description id="signing-dev-info">
-                  &disabledUnsigned.devInfo.start;<label class="text-link plain" id="signing-dev-manual-link">&disabledUnsigned.devInfo.linkToManual;</label>&disabledUnsigned.devInfo.end;
-                </description>
-              </vbox>
               <vbox id="plugindeprecation-notice" class="alert-container">
                 <hbox class="alert">
                   <description>&pluginDeprecation.description; &#160;