lower fs name

backend/handler/filesystem/roms_handler.py

@@ -60,6 +60,10 @@ COMPRESSED_FILE_EXTENSIONS = frozenset(
     )
 )
 
+# PICO-8 cartridges are often stored as PNG files
+PICO8_CARTRIDGE_EXTENSION = ".p8.png"
+
+
 # CHD (Compressed Hunks of Data) v5 format constants
 # See: https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h
 CHD_SIGNATURE: Final = b"MComprHD"
@@ -105,8 +109,6 @@ NON_HASHABLE_PLATFORMS = frozenset(
 
 FILE_READ_CHUNK_SIZE = 1024 * 8
 
-PICO8_CARTRIDGE_EXTENSION = ".p8.png"
-
 
 class FSRom(TypedDict):
     fs_name: str
@@ -740,7 +742,9 @@ class FSRomsHandler(FSHandler):
         the cartridge label/cover art.  When such a ROM is found we can use the
         file itself as the cover instead of fetching one from an external source.
         """
-        if platform_slug == UPS.PICO and fs_name.endswith(PICO8_CARTRIDGE_EXTENSION):
+        if platform_slug == UPS.PICO and fs_name.lower().endswith(
+            PICO8_CARTRIDGE_EXTENSION
+        ):
             rom_path = self.validate_path(f"{fs_path}/{fs_name}")
             return f"file://{rom_path}"
         return None