Index: chromium-128.0.6613.113/chrome/browser/extensions/api/runtime/chrome_runtime_api_delegate.cc
===================================================================
--- chromium-128.0.6613.113.orig/chrome/browser/extensions/api/runtime/chrome_runtime_api_delegate.cc
+++ chromium-128.0.6613.113/chrome/browser/extensions/api/runtime/chrome_runtime_api_delegate.cc
@@ -348,6 +348,8 @@
     info->arch = extensions::api::runtime::PlatformArch::kMips64;
   } else if (strcmp(arch, "riscv64") == 0) {
     info->arch = extensions::api::runtime::PlatformArch::kRiscv64;
+  } else if (strcmp(arch, "ppc64") == 0) {
+    info->arch = extensions::api::runtime::PlatformArch::kPpc64;
   } else {
     NOTREACHED();
   }
Index: chromium-128.0.6613.113/extensions/common/api/runtime.json
===================================================================
--- chromium-128.0.6613.113.orig/extensions/common/api/runtime.json
+++ chromium-128.0.6613.113/extensions/common/api/runtime.json
@@ -99,7 +99,8 @@
             {"name": "x86-64", "description": "Specifies the processer architecture as x86-64."},
             {"name": "mips", "description": "Specifies the processer architecture as mips."},
             {"name": "mips64", "description": "Specifies the processer architecture as mips64."},
-            {"name": "riscv64", "description": "Specifies the processer architecture as riscv64."}
+            {"name": "riscv64", "description": "Specifies the processer architecture as riscv64."},
+            {"name": "ppc64", "description": "Specifies the processer architecture as ppc64."}
          ],
         "description": "The machine's processor architecture."
       },