diff --git a/.kokoro/populate-secrets.sh b/.kokoro/populate-secrets.sh
index 85801f40..e6ce8200 100755
--- a/.kokoro/populate-secrets.sh
+++ b/.kokoro/populate-secrets.sh
@@ -15,12 +15,19 @@
 
 set -eo pipefail
 
+function now { date +"%Y-%m-%d %H:%M:%S" | tr -d '\n' ;}
+function msg { println "$*" >&2 ;}
+function println { printf '%s\n' "$(now) $*" ;}
+
+
 # Populates requested secrets set in SECRET_MANAGER_KEYS from service account:
 # kokoro-trampoline@cloud-devrel-kokoro-resources.iam.gserviceaccount.com
 SECRET_LOCATION="${KOKORO_GFILE_DIR}/secret_manager"
+msg "Creating folder on disk for secrets: ${SECRET_LOCATION}"
 mkdir -p ${SECRET_LOCATION}
 for key in $(echo ${SECRET_MANAGER_KEYS} | sed "s/,/ /g")
 do
+  msg "Retrieving secret ${key}"
   docker run --entrypoint=gcloud \
     --volume=${KOKORO_GFILE_DIR}:${KOKORO_GFILE_DIR} \
     gcr.io/google.com/cloudsdktool/cloud-sdk \
@@ -29,4 +36,9 @@ do
     --project cloud-devrel-kokoro-resources \
     --secret $key > \
     "$SECRET_LOCATION/$key"
+  if [[ $? == 0 ]]; then
+    msg "Secret written to ${SECRET_LOCATION}/${key}"
+  else
+    msg "Error retrieving secret ${key}"
+  fi
 done
diff --git a/src/v1/image_annotator_client.ts b/src/v1/image_annotator_client.ts
index 8ae09cbf..c21a289b 100644
--- a/src/v1/image_annotator_client.ts
+++ b/src/v1/image_annotator_client.ts
@@ -108,14 +108,11 @@ export class ImageAnnotatorClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ImageAnnotatorClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1/product_search_client.ts b/src/v1/product_search_client.ts
index 9e89cdbc..406f87a2 100644
--- a/src/v1/product_search_client.ts
+++ b/src/v1/product_search_client.ts
@@ -123,14 +123,11 @@ export class ProductSearchClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ProductSearchClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p1beta1/image_annotator_client.ts b/src/v1p1beta1/image_annotator_client.ts
index e5d1e0ee..cb4e6567 100644
--- a/src/v1p1beta1/image_annotator_client.ts
+++ b/src/v1p1beta1/image_annotator_client.ts
@@ -100,14 +100,11 @@ export class ImageAnnotatorClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ImageAnnotatorClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p2beta1/image_annotator_client.ts b/src/v1p2beta1/image_annotator_client.ts
index 01b754f4..87261012 100644
--- a/src/v1p2beta1/image_annotator_client.ts
+++ b/src/v1p2beta1/image_annotator_client.ts
@@ -107,14 +107,11 @@ export class ImageAnnotatorClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ImageAnnotatorClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p3beta1/image_annotator_client.ts b/src/v1p3beta1/image_annotator_client.ts
index 2293c6fd..71841a85 100644
--- a/src/v1p3beta1/image_annotator_client.ts
+++ b/src/v1p3beta1/image_annotator_client.ts
@@ -108,14 +108,11 @@ export class ImageAnnotatorClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ImageAnnotatorClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p3beta1/product_search_client.ts b/src/v1p3beta1/product_search_client.ts
index 761cd232..2fa2b1e2 100644
--- a/src/v1p3beta1/product_search_client.ts
+++ b/src/v1p3beta1/product_search_client.ts
@@ -123,14 +123,11 @@ export class ProductSearchClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ProductSearchClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p4beta1/image_annotator_client.ts b/src/v1p4beta1/image_annotator_client.ts
index 0b6e1a12..ecbbd2d5 100644
--- a/src/v1p4beta1/image_annotator_client.ts
+++ b/src/v1p4beta1/image_annotator_client.ts
@@ -108,14 +108,11 @@ export class ImageAnnotatorClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ImageAnnotatorClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/src/v1p4beta1/product_search_client.ts b/src/v1p4beta1/product_search_client.ts
index 6700577d..7f246757 100644
--- a/src/v1p4beta1/product_search_client.ts
+++ b/src/v1p4beta1/product_search_client.ts
@@ -127,14 +127,11 @@ export class ProductSearchClient {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the ProductSearchClient constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.
diff --git a/synth.metadata b/synth.metadata
index c2de4a0c..29b9478b 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-vision.git",
-        "sha": "d6b10b8e386461cdd6427b69679c89921c125435"
+        "sha": "7df91d4fc15f64aa9e462af45136ae5a361cc162"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1c92077459db3dc50741e878f98b08c6261181e0"
+        "sha": "e7034945fbdc0e79d3c57f6e299e5c90b0f11469"
       }
     }
   ],