diff --git a/patch_index.py b/patch_index.py
index 1ec80bb..e230846 100644
--- a/patch_index.py
+++ b/patch_index.py
@@ -51,9 +51,17 @@ try:
     mf["name"] = "Inference Co\u2011op"
     mf["short_name"] = "Inference"
     mf["description"] = "Member-governed AI inference — private and renewable model choices."
-    for icon in mf.get("icons", []):
-        if icon.get("sizes") == "512x512":
-            icon["purpose"] = "any maskable"
+    # Deterministic icon list: explicit any/maskable entries (no dual-purpose
+    # values — some Firefox Android versions mishandle "any maskable"), and
+    # the launcher-suitable sizes first.
+    mf["icons"] = [
+        {"src": "assets/icon-192x192.png", "sizes": "192x192", "type": "image/png", "purpose": "any"},
+        {"src": "assets/maskable-icon.png", "sizes": "512x512", "type": "image/png", "purpose": "any"},
+        {"src": "assets/maskable-icon.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable"},
+        {"src": "assets/apple-touch-icon-180x180.png", "sizes": "180x180", "type": "image/png"},
+        {"src": "assets/favicon-32x32.png", "sizes": "32x32", "type": "image/png"},
+        {"src": "assets/favicon-16x16.png", "sizes": "16x16", "type": "image/png"},
+    ]
     open(MPATH, "w", encoding="utf-8").write(_json.dumps(mf, indent=2))
     print("manifest: co-op identity set")
 except OSError: