If you are using the latest version of Firefox (I have version 49.0.2) for your internet browser, you have probably noticed that the Upload File button is missing. We are aware of this. It's a bug that took place during the latest upgrade of Firefox, and we are waiting for a fix from XenForo (our site's platform). In the meantime, to make the button appear, I have disabled the Flash Loader on the site. The Flash Loader allows visitors with Adobe Flash installed to select multiple files to upload at once, and to see a progress meter during the upload. Once we have the fix, I will re-enable the Flash Loader. Sorry for the inconvenience. For now, you can upload your images one at a time.