diff --git a/apps/desktop/desktop_native/chromium_importer/src/chromium/platform/sandbox.rs b/apps/desktop/desktop_native/chromium_importer/src/chromium/platform/sandbox.rs
index ef5884cf4f5..e9da982b7b7 100644
--- a/apps/desktop/desktop_native/chromium_importer/src/chromium/platform/sandbox.rs
+++ b/apps/desktop/desktop_native/chromium_importer/src/chromium/platform/sandbox.rs
@@ -1,9 +1,8 @@
 /// Sandbox specific (for Mac App Store Builds)
-
 use anyhow::{anyhow, Result};
 use serde::{Deserialize, Serialize};
 
-// Bundle IDs of supported Chromium browsers - used to determine if browser is installed 
+// Bundle IDs of supported Chromium browsers - used to determine if browser is installed
 const BROWSER_BUNDLE_IDS: &[(&str, &str)] = &[
     ("Chrome", "com.google.Chrome"),
     ("Chromium", "org.chromium.Chromium"),
@@ -15,12 +14,16 @@ const BROWSER_BUNDLE_IDS: &[(&str, &str)] = &[
 ];
 
 #[derive(Debug, Deserialize)]
-#[serde(tag = "type")]
+#[serde(rename_all = "camelCase")]
+struct CheckBrowserInstalledResponse {
+    is_installed: bool,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "camelCase", tag = "type")]
 enum CommandResult<T> {
     // rename = "camelCase" was a review suggestion with breaking changes
-    #[serde(rename = "success")]
     Success { value: T },
-    #[serde(rename = "error")]
     Error { error: String },
 }
 
@@ -202,9 +205,3 @@ async fn is_browser_installed(browser_name: &str) -> Result<bool> {
         CommandResult::Error { error } => Err(anyhow!("{}", error)),
     }
 }
-
-#[derive(Debug, Deserialize)]
-struct CheckBrowserInstalledResponse {
-    #[serde(rename = "isInstalled")]
-    is_installed: bool,
-}
diff --git a/apps/desktop/desktop_native/objc/src/native/chromium_importer/browser_access_manager.m b/apps/desktop/desktop_native/objc/src/native/chromium_importer/browser_access_manager.m
index bd34b30f445..f36a9df4ca3 100644
--- a/apps/desktop/desktop_native/objc/src/native/chromium_importer/browser_access_manager.m
+++ b/apps/desktop/desktop_native/objc/src/native/chromium_importer/browser_access_manager.m
@@ -51,9 +51,34 @@
         return nil;
     }
 
+    // Compare the selected path against the expected browser directory
+    NSString *expectedPath = browserPath.path;
+    NSString *selectedPath = selectedURL.path;
+    if (![selectedPath isEqualToString:expectedPath]) {
+        return nil;
+    }
+
+    // Validate the selected directory contains a Local State file
     NSURL *localStatePath = [selectedURL URLByAppendingPathComponent:@"Local State"];
     if (![[NSFileManager defaultManager] fileExistsAtPath:localStatePath.path]) {
-        // Invalid directory selected caller will handle
+        return nil;
+    }
+
+    // Validate Local State contains expected Chromium structure
+    NSData *localStateData = [NSData dataWithContentsOfURL:localStatePath];
+    if (!localStateData) {
+        return nil;
+    }
+    NSError *jsonError = nil;
+    id jsonObject = [NSJSONSerialization JSONObjectWithData:localStateData options:0 error:&jsonError];
+    if (!jsonObject || ![jsonObject isKindOfClass:[NSDictionary class]]) {
+        return nil;
+    }
+
+    NSDictionary *localState = (NSDictionary *)jsonObject;
+
+    // Verify essential Chromium/Chrome keys exist to confirm this is actually a browser data directory
+    if (!localState[@"profile"] && !localState[@"browser"]) {
         return nil;
     }
 
@@ -145,7 +170,6 @@
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
     NSString *key = [self bookmarkKeyFor:browserName];
     [defaults setObject:data forKey:key];
-    [defaults synchronize];
 }
 
 - (NSData *)loadBookmarkForBrowser:(NSString *)browserName {