diff --git a/src/cdp/domains/network.zig b/src/cdp/domains/network.zig
index c04ee33b..5b9a49df 100644
--- a/src/cdp/domains/network.zig
+++ b/src/cdp/domains/network.zig
@@ -19,6 +19,7 @@
 const std = @import("std");
 const lp = @import("lightpanda");
 const Allocator = std.mem.Allocator;
+const log = @import("../../log.zig");
 
 const CdpStorage = @import("storage.zig");
 
@@ -117,7 +118,12 @@ 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.warn(.not_implemented, "partition key", .{ .src = "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..e0f67456 100644
--- a/src/cdp/domains/storage.zig
+++ b/src/cdp/domains/storage.zig
@@ -128,7 +128,14 @@ 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) {
+        log.warn(.not_implemented, "partition key", .{ .src = "setCdpCookie" });
+    }
+    // Still reject unsupported features
+    if (param.priority != .Medium or param.sameParty != null or param.sourceScheme != null) {
         return error.NotImplemented;
     }