diff --git a/webapprt/Startup.jsm b/webapprt/Startup.jsm
index a6ad8a9a7e6..7d4ff38cfe9 100644
--- a/webapprt/Startup.jsm
+++ b/webapprt/Startup.jsm
@@ -113,9 +113,13 @@ this.startup = function(window) {
       let windowTitle = webappBundle.GetStringFromName("disable-warning.title");
       let windowText = webappBundle.GetStringFromName("disable-warning.description");
       let infoLabel = webappBundle.GetStringFromName("disable-warning.info.label");
-      let infoURL = webappBundle.GetStringFromName("disable-warning.info.url");
       let showAgainLabel = webappBundle.GetStringFromName("disable-warning.show-again");
 
+      // Hard-code the URL to the SUMO article, because SUMO will take care
+      // of directing users to the locale-appropriate version (or the en-US
+      // version if there isn't a version for the user's locale).
+      let infoURL = "https://support.mozilla.org/kb/runtime";
+
       let buttonFlags = (Services.prompt.BUTTON_POS_0 * Services.prompt.BUTTON_TITLE_OK) +
                         (Services.prompt.BUTTON_POS_1 * Services.prompt.BUTTON_TITLE_IS_STRING) +
                         Services.prompt.BUTTON_POS_0_DEFAULT;
diff --git a/webapprt/locales/en-US/webapprt/webapp.properties b/webapprt/locales/en-US/webapprt/webapp.properties
index 89f6990bffd..c12d3d4b54f 100644
--- a/webapprt/locales/en-US/webapprt/webapp.properties
+++ b/webapprt/locales/en-US/webapprt/webapp.properties
@@ -55,5 +55,4 @@ paymentDialog.message=Which payment provider do you want to use?
 disable-warning.title=Warning: App Will Be Disabled
 disable-warning.description=This app will be disabled after you upgrade to a newer version of Firefox, which no longer includes a feature to run web apps separately from the browser.
 disable-warning.info.label=More information…
-disable-warning.info.url=https://support.mozilla.org/kb/runtime
 disable-warning.show-again=Show this warning the next time I start this app