Check browser extension config only for host frames

src/boot/index.js

@@ -22,19 +22,9 @@ if (isBrowserSupported()) {
   const config = /** @type {AnnotatorConfig|SidebarAppConfig} */ (
     parseJsonConfig(document)
   );
-
-  // When the boot script is executed from the browser extension, a config
-  // generated by that specific extension is required
-  const extensionId = getExtensionId();
-  if (extensionId && !hasExtensionConfig(extensionId)) {
-    throw new Error(
-      'Could not start Hypothesis extension as configuration is missing'
-    );
-  }
-
   const assetRoot = processUrlTemplate(config.assetRoot || '__ASSET_ROOT__');
 
-  // Check whether this is the sidebar app (indicated by the presence of a
+  // Check whether this is a mini-app (indicated by the presence of a
   // `<hypothesis-app>` element) and load the appropriate part of the client.
   if (document.querySelector('hypothesis-app')) {
     const sidebarConfig = /** @type {SidebarAppConfig} */ (config);
@@ -44,6 +34,15 @@ if (isBrowserSupported()) {
       apiUrl: sidebarConfig.apiUrl,
     });
   } else {
+    // When the boot script is executed from the browser extension on a host
+    // frame, a config generated by that specific extension is required
+    const extensionId = getExtensionId();
+    if (extensionId && !hasExtensionConfig(extensionId)) {
+      throw new Error(
+        'Could not start Hypothesis extension as configuration is missing'
+      );
+    }
+
     // nb. If new asset URLs are added here, the browser extension and
     // `hypothesis-injector.ts` need to be updated.
     const annotatorConfig = /** @type {AnnotatorConfig} */ (config);