diff --git a/packages/core/src/config.js b/packages/core/src/config.js
index 68d090244..2162c690d 100644
--- a/packages/core/src/config.js
+++ b/packages/core/src/config.js
@@ -459,7 +459,8 @@ export const snapshotSchema = {
                 type: 'array',
                 items: { type: 'string' }
               },
-              cookies: { type: 'string' },
+              cookies: { oneOf: [{ type: 'string' }, { type: 'array', items: { type: 'string' } }] },
+              userAgent: { type: 'string' },
               width: { $ref: '/config/snapshot#/properties/widths/items' },
               resources: {
                 type: 'array',
diff --git a/packages/core/src/discovery.js b/packages/core/src/discovery.js
index d03d89200..3a1036dbb 100644
--- a/packages/core/src/discovery.js
+++ b/packages/core/src/discovery.js
@@ -69,6 +69,11 @@ function debugSnapshotOptions(snapshot) {
   debugProp(snapshot, 'clientInfo');
   debugProp(snapshot, 'environmentInfo');
   debugProp(snapshot, 'domSnapshot', Boolean);
+  if (snapshot.responsiveSnapshotCapture) {
+    debugProp(snapshot, 'domSnapshot.0.userAgent');
+  } else {
+    debugProp(snapshot, 'domSnapshot.userAgent');
+  }
 
   for (let added of (snapshot.additionalSnapshots || [])) {
     log.debug(`Additional snapshot: ${added.name}`, snapshot.meta);
diff --git a/packages/dom/src/serialize-dom.js b/packages/dom/src/serialize-dom.js
index 0402d6d69..b800d01a6 100644
--- a/packages/dom/src/serialize-dom.js
+++ b/packages/dom/src/serialize-dom.js
@@ -117,6 +117,7 @@ export function serializeDOM(options) {
   let result = {
     html: serializeHTML(ctx),
     cookies: cookies,
+    userAgent: navigator.userAgent,
     warnings: Array.from(ctx.warnings),
     resources: Array.from(ctx.resources),
     hints: Array.from(ctx.hints)