No. Dell does not offer downloadable or user-installable firmware files for the U2414H. Unlike newer monitors, this model does not have a user-updatable firmware mechanism via USB or DisplayPort.
"I need to update the firmware on my Dell U2414H." Dell U2414h Firmware
Hey everyone, I’ve got three Dell U2414H monitors in a multi-monitor setup. I’m trying to solve a DisplayPort daisy-chaining issue (MST) where the 2nd monitor goes black randomly. Dell U2414h Firmware
"Thank you for contacting Dell Support. Regarding the Dell U2414H monitor: This model does not support user-installable firmware updates. Dell does not provide any firmware files for download for this product. Dell U2414h Firmware