Wd15 Firmware Download - [best]
Since "WD-15" typically refers to the (not a Western Digital hard drive), this post assumes you are looking for the Dell Dock firmware. Title: How to Download & Update Dell WD-15 Firmware (Official Guide)
The Dell WD-15 dock does not have user-serviceable firmware that downloads as a standalone file. Instead, firmware updates are included within Dell Command | Update or the specific host laptop’s BIOS/driver packages. wd15 firmware download