I'm trying to use JPEG XL (.jxl) images with ComfyUI's LoadImage node, but the files don't appear in the Windows file picker dialog when I click the "Upload" button.

[koloved]

hat I've tried:

Installed pillow-jxl-plugin and registered the MIME type in folder_paths.py:

import mimetypes
mimetypes.add_type("image/jxl", ".jxl")

extension_mimetypes_cache = {
    "webp" : "image",
    "fbx" : "model",
    "jxl" : "image",  # Added this
}

The problem:

The Windows file picker still doesn't show .jxl files (also want to load Avif images). The dialog defaults to "All Supported Types (.png;.jpg;.jpeg;.jfif;.pjpeg;.pjp;*.webp)" and .jxl isn't included. If I manually switch to "All Files (.)" in the picker, I can see and load the .jxl files successfully.