diff --git a/data-src/index.js b/data-src/index.js
index 6dd60fd..2055e5e 100644
--- a/data-src/index.js
+++ b/data-src/index.js
@@ -4849,7 +4849,7 @@ class Firmware {
         let div = this.createFileUploader('/updateApplication');
         general.reloadApp = true;
         let inst = div.querySelector('div[id=divInstText]');
-        inst.innerHTML = '<div style="font-size:14px;">Select a binary file [SomfyController.littlefs.bin] containing the littlefs data for the application then press the Upload File button.</div>';
+        inst.innerHTML = '<div style="font-size:14px;">Select a binary file [SomfyController.littlefs.&lt;chip&gt;.bin, e.g. SomfyController.littlefs.esp32.bin] containing the littlefs data for the application then press the Upload File button.</div>';
         if (this.isMobile()) {
             inst.innerHTML += `<div style="width:100%;color:red;text-align:center;font-weight:bold;"><span style="margin-top:7px;width:100%;background:yellow;padding:3px;display:inline-block;border-radius:5px;background:white;">WARNING<span></div>`;
             inst.innerHTML += '<hr/><div style="font-size:14px;margin-bottom:10px;">This browser does not support automatic backups.  It is highly recommended that you back up your configuration using the backup button before proceeding.</div>';
diff --git a/src/GitOTA.cpp b/src/GitOTA.cpp
index 9b13d9c..9391624 100644
--- a/src/GitOTA.cpp
+++ b/src/GitOTA.cpp
@@ -43,7 +43,7 @@ void GitRelease::setReleaseProperty(const char *key, const char *val) {
 void GitRelease::setAssetProperty(const char *key, const char *val) {
   if(strcmp(key, "name") == 0) {
     //Serial.println(val);
-    if(strstr(val, "littlefs.bin")) this->hasFS = true;
+    if(isFsAsset(val)) this->hasFS = true;
     else if(strstr(val, "ino.esp32.bin")) {
       if(strlen(this->hwVersions)) strcat(this->hwVersions, ",");
       strcat(this->hwVersions, "32");
@@ -353,22 +353,16 @@ void GitUpdater::emitDownloadProgress(uint8_t num, size_t total, size_t loaded,
   sockEmit.loop();
   webServer.loop();
 }
-void GitUpdater::setFirmwareFile() {
+// The chip part of this board's release asset names.
+static const char *chipName() {
     esp_chip_info_t ci;
     esp_chip_info(&ci);
     switch(ci.model) {
-      case esp_chip_model_t::CHIP_ESP32S3:
-        strcpy(this->currentFile, "SomfyController.ino.esp32s3.bin");
-        break;
-      case esp_chip_model_t::CHIP_ESP32S2:
-        strcpy(this->currentFile, "SomfyController.ino.esp32s2.bin");
-        break;
-      case esp_chip_model_t::CHIP_ESP32C3:
-        strcpy(this->currentFile, "SomfyController.ino.esp32c3.bin");
-        break;
-      default:
-        strcpy(this->currentFile, "SomfyController.ino.esp32.bin");
-        break;
+      case esp_chip_model_t::CHIP_ESP32S3: return "esp32s3";
+      case esp_chip_model_t::CHIP_ESP32S2: return "esp32s2";
+      case esp_chip_model_t::CHIP_ESP32C3: return "esp32c3";
+      case esp_chip_model_t::CHIP_ESP32C6: return "esp32c6";
+      default: return "esp32";
     }
 }
 
@@ -379,14 +373,14 @@ bool GitUpdater::beginUpdate(const char *version) {
   
   strcpy(this->targetRelease, version);
   this->emitUpdateCheck();
-  this->setFirmwareFile();
+  releaseAssetName(this->currentFile, sizeof(this->currentFile), "ino", chipName());
   this->partition = U_FLASH;
   this->lockFS = this->cancelled = false;
   this->error = 0;
   this->error = this->downloadFile();
   if(this->error == 0 && !this->cancelled) {
     somfy.commit();
-    strcpy(this->currentFile, "SomfyController.littlefs.bin");
+    releaseAssetName(this->currentFile, sizeof(this->currentFile), "littlefs", chipName());
     this->partition = U_SPIFFS;
     this->lockFS = true;
     this->error = this->downloadFile();
@@ -405,8 +399,8 @@ bool GitUpdater::beginUpdate(const char *version) {
   return true;
 }
 bool GitUpdater::recoverFilesystem() {
-  sprintf(this->baseUrl, "https://github.com/rstrouse/ESPSomfy-RTS/releases/download/%s/", settings.fwVersion.name);
-  strcpy(this->currentFile, "SomfyController.littlefs.bin");
+  sprintf(this->baseUrl, "https://github.com/cjkas/ESPSomfy-RTS/releases/download/%s/", settings.fwVersion.name);
+  releaseAssetName(this->currentFile, sizeof(this->currentFile), "littlefs", chipName());
   this->status = GIT_UPDATING;
   this->partition = U_SPIFFS;
   this->lockFS = true;
diff --git a/src/GitOTA.h b/src/GitOTA.h
index 6996f83..7a02112 100644
--- a/src/GitOTA.h
+++ b/src/GitOTA.h
@@ -55,7 +55,6 @@ class GitUpdater {
     bool beginUpdate(const char *release);
     bool endUpdate();
     int8_t downloadFile();
-    void setFirmwareFile();
     void setCurrentRelease(GitRepo &repo);
     void loop();
 
diff --git a/src/Utils.cpp b/src/Utils.cpp
index 75c77f0..2651f2a 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -150,6 +150,14 @@ bool worthRoaming(bool connected, int currentRssi, int apRssi, int minGain) {
 bool otaProven(bool networkUp, unsigned long uptimeMs, unsigned long minUptimeMs) {
   return networkUp && uptimeMs >= minUptimeMs;
 }
+bool releaseAssetName(char *buf, size_t size, const char *kind, const char *chip) {
+  int n = snprintf(buf, size, "SomfyController.%s.%s.bin", kind, chip);
+  return n >= 0 && (size_t)n < size;
+}
+bool isFsAsset(const char *name) {
+  size_t len = strlen(name);
+  return strstr(name, ".littlefs.") && len >= 4 && strcmp(name + len - 4, ".bin") == 0;
+}
 const char *wifiAuthModeName(uint8_t authMode) {
   switch(authMode) {
     case 0: return "OPEN";
diff --git a/src/Utils.h b/src/Utils.h
index 27c9ba9..723d9d5 100644
--- a/src/Utils.h
+++ b/src/Utils.h
@@ -86,6 +86,12 @@ heap_emit_t heapEmitTarget(uint8_t num, uint32_t sinceLastMs, uint32_t intervalM
 // update has proven itself: it has run for minUptimeMs and the network is
 // up.  Until then a reset rolls back to the previous firmware.
 bool otaProven(bool networkUp, unsigned long uptimeMs, unsigned long minUptimeMs);
+// A release asset's name: "SomfyController.<kind>.<chip>.bin", kind "ino" for
+// the firmware or "littlefs" for the web UI image, chip e.g. "esp32s3".  False
+// when it doesn't fit in size.
+bool releaseAssetName(char *buf, size_t size, const char *kind, const char *chip);
+// Whether a release asset is a LittleFS image, for any chip.
+bool isFsAsset(const char *name);
 // How well loop() keeps up: the passes it made per second and its longest
 // pass, over the window since the last memStatus broadcast.  Only the loop
 // task calls record(), rate(), maxUs() and publish().  publish() closes the
diff --git a/test/test_utils/test_utils.cpp b/test/test_utils/test_utils.cpp
index b17d0e0..2e5db6e 100644
--- a/test/test_utils/test_utils.cpp
+++ b/test/test_utils/test_utils.cpp
@@ -272,6 +272,34 @@ static void test_otaProven_not_without_network() {
   TEST_ASSERT_FALSE(otaProven(false, 3600000, 60000));
 }
 
+/*********************************************************************
+ * releaseAssetName / isFsAsset
+ ********************************************************************/
+static void test_releaseAssetName_matches_the_release_workflow() {
+  // .github/workflows/build.yaml fwname and fsname.
+  char buf[64];
+  TEST_ASSERT_TRUE(releaseAssetName(buf, sizeof(buf), "ino", "esp32"));
+  TEST_ASSERT_EQUAL_STRING("SomfyController.ino.esp32.bin", buf);
+  TEST_ASSERT_TRUE(releaseAssetName(buf, sizeof(buf), "littlefs", "esp32s3"));
+  TEST_ASSERT_EQUAL_STRING("SomfyController.littlefs.esp32s3.bin", buf);
+}
+static void test_releaseAssetName_too_small_buffer() {
+  char buf[16];
+  TEST_ASSERT_FALSE(releaseAssetName(buf, sizeof(buf), "littlefs", "esp32c6"));
+  TEST_ASSERT_EQUAL(sizeof(buf) - 1, strlen(buf));
+}
+static void test_isFsAsset_per_chip_images() {
+  TEST_ASSERT_TRUE(isFsAsset("SomfyController.littlefs.esp32.bin"));
+  TEST_ASSERT_TRUE(isFsAsset("SomfyController.littlefs.esp32c6.bin"));
+  TEST_ASSERT_TRUE(isFsAsset("SomfyController.littlefs.bin"));
+}
+static void test_isFsAsset_not_the_other_assets() {
+  TEST_ASSERT_FALSE(isFsAsset("SomfyController.ino.esp32.bin"));
+  TEST_ASSERT_FALSE(isFsAsset("SomfyController.onboard.esp32.bin.zip"));
+  TEST_ASSERT_FALSE(isFsAsset("SomfyController.littlefs.bin.sha256"));
+  TEST_ASSERT_FALSE(isFsAsset(""));
+}
+
 /*********************************************************************
  * wifiAuthModeName
  ********************************************************************/
@@ -402,6 +430,10 @@ int main(int argc, char **argv) {
   RUN_TEST(test_otaProven_after_the_minimum_uptime_with_network);
   RUN_TEST(test_otaProven_not_before_the_minimum_uptime);
   RUN_TEST(test_otaProven_not_without_network);
+  RUN_TEST(test_releaseAssetName_matches_the_release_workflow);
+  RUN_TEST(test_releaseAssetName_too_small_buffer);
+  RUN_TEST(test_isFsAsset_per_chip_images);
+  RUN_TEST(test_isFsAsset_not_the_other_assets);
   RUN_TEST(test_wifiAuthModeName_matches_the_idf_enum);
   RUN_TEST(test_wifiAuthModeName_unknown_past_the_shared_values);
   RUN_TEST(test_heapEmitTarget_one_client_always_gets_it);