diff --git a/common/bootstrap.js b/common/bootstrap.js
index 7ea5a905..e0564e1a 100755
--- a/common/bootstrap.js
+++ b/common/bootstrap.js
@@ -63,6 +63,8 @@ let components = {};
 let getURI = null;
 
 let JSMLoader = {
+    DEBUG_HANGS: false,
+
     SANDBOX: Cu.nukeSandbox,
 
     get addon() addon,
@@ -250,7 +252,13 @@ function init() {
     JSMLoader.config = manifest;
 
     bootstrap_jsm = module(BOOTSTRAP);
-    if (!JSMLoader.SANDBOX)
+    if (JSMLoader.DEBUG_HANGS) {
+        bootstrap = Services.ww.openWindow(
+            null, "chrome://dactyl/content/blank.xul",
+            "dactyl-parent", "chrome,dialog,titlebar", null);
+        Services.scriptloader.loadSubScript(BOOTSTRAP, bootstrap);
+    }
+    else if (!JSMLoader.SANDBOX)
         bootstrap = bootstrap_jsm;
     else {
         bootstrap = Cu.Sandbox(Cc["@mozilla.org/systemprincipal;1"].createInstance(),
diff --git a/common/content/about.xul b/common/content/about.xul
index 3dbfdd5d..c2aeb516 100644
--- a/common/content/about.xul
+++ b/common/content/about.xul
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
 <?xml-stylesheet href="resource://dactyl-local-skin/about.css" type="text/css"?>
-<!DOCTYPE overlay SYSTEM "dactyl://content/dtd">
+<!DOCTYPE page SYSTEM "dactyl://content/dtd">
 
 <page id="about-&dactyl.name;" orient="vertical" title="About &dactyl.appName;"
       xmlns="&xmlns.xul;" xmlns:html="&xmlns.html;">
diff --git a/common/content/blank.xul b/common/content/blank.xul
new file mode 100644
index 00000000..be572a19
--- /dev/null
+++ b/common/content/blank.xul
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE window>
+
+<?xml-stylesheet href="chrome://global/skin/"?>
+
+<window id="dactyl-blank-window" title="Dactyl">
+  <description>Hello, there.</description>
+</window>
+
+<!-- vim: set sw=2 sts=2 et: -->
diff --git a/pentadactyl/install.rdf b/pentadactyl/install.rdf
index ed7cf477..d55b72ea 100644
--- a/pentadactyl/install.rdf
+++ b/pentadactyl/install.rdf
@@ -31,7 +31,7 @@
         <em:targetApplication>
             <Description
                 em:id="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}"
-                em:minVersion="34.0"
+                em:minVersion="31.0"
                 em:maxVersion="39.*"/>
         </em:targetApplication>
     </Description>