Fixed regression in full embedding document replacement due to timing changes.

src/content/PlaceHolder.js

@@ -119,10 +119,14 @@ var PlaceHolder = (() => {
       let replacement = createHTMLElement("a");
       replacement.className = "__NoScript_PlaceHolder__";
       cloneStyle(element, replacement);
-      replacement.style.backgroundImage = `url(${ICON_URL})`;
+      let setImage = () => replacement.style.backgroundImage = `url(${ICON_URL})`;
 
       if (ns.embeddingDocument) {
         replacement.classList.add("document");
+        window.stop();
+        setTimeout(setImage, 0); // defer to bypass window.stop();
+      } else {
+        setImage();
       }
 
       replacement.href = url;

src/content/embeddingDocument.js

@@ -1,5 +1,5 @@
 if (ns.embeddingDocument) {
-  ns.on("capabilities", () => {
+  let replace = () => {
     for (let policyType of ["object", "media"]) {
       let request = {
         id: `noscript-${policyType}-doc`,
@@ -19,9 +19,26 @@ if (ns.embeddingDocument) {
         if (ph.replacements.size > 0) {
           debug(`Created placeholder for ${policyType} at ${document.URL}`);
           seen.record({policyType, request, allowed: false});
-          break;
         }
       }
     }
+  };
+  ns.on("capabilities", () => {
+    if (!document.body.firstChild) { // we've been called early
+      setTimeout(replace, 0);
+      let types = {
+        "media": /^(?:video|audio)\//i,
+        "object": /^application\//i,
+      }
+      for (let [type, rx] of Object.entries(types)) {
+        if (rx.test(document.contentType) && !ns.allows(type)) {
+          window.stop();
+          break;
+        }
+      }
+
+    } else {
+      replace();
+    }
   });
 }