diff --git a/src/cdp/domains/network.zig b/src/cdp/domains/network.zig
index c04ee33b..dab07df8 100644
--- a/src/cdp/domains/network.zig
+++ b/src/cdp/domains/network.zig
@@ -117,7 +117,12 @@ fn deleteCookies(cmd: anytype) !void {
         path: ?[]const u8 = null,
         partitionKey: ?CdpStorage.CookiePartitionKey = null,
     })) orelse return error.InvalidParams;
-    if (params.partitionKey != null) return error.NotImplemented;
+    // Silently ignore partitionKey since we don't support partitioned cookies (CHIPS).
+    // This allows Puppeteer's page.setCookie() to work, which sends deleteCookies
+    // with partitionKey as part of its cookie-setting workflow.
+    if (params.partitionKey != null) {
+        log.debug(.network, "partitionKey ignored in deleteCookies", .{});
+    }
 
     const bc = cmd.browser_context orelse return error.BrowserContextNotLoaded;
     const cookies = &bc.session.cookie_jar.cookies;
diff --git a/src/cdp/domains/storage.zig b/src/cdp/domains/storage.zig
index c7546ad6..d772f736 100644
--- a/src/cdp/domains/storage.zig
+++ b/src/cdp/domains/storage.zig
@@ -128,7 +128,15 @@ pub const CdpCookie = struct {
 };
 
 pub fn setCdpCookie(cookie_jar: *CookieJar, param: CdpCookie) !void {
-    if (param.priority != .Medium or param.sameParty != null or param.sourceScheme != null or param.partitionKey != null) {
+    // Silently ignore partitionKey since we don't support partitioned cookies (CHIPS).
+    // This allows Puppeteer's page.setCookie() to work, which may send cookies with
+    // partitionKey as part of its cookie-setting workflow.
+    if (param.partitionKey != null) {
+        const log = @import("../../log.zig");
+        log.debug(.storage, "partitionKey ignored in setCdpCookie", .{});
+    }
+    // Still reject unsupported features
+    if (param.priority != .Medium or param.sameParty != null or param.sourceScheme != null) {
         return error.NotImplemented;
     }