Your version probably got installed when you updated to Firefox 53.0 and the current version, just been released, is 53.0.2 which version wouldn't trigger an update of the maintenance service.
Read this answer in context I checked my Programs Folder, and the maintenance program has the same date as yours.
He takes pride in being able to explain things in a simple, clear and concise manner.firefox update always downloads, but the maintenance doesnt update? firefox update always downloads, but the maintenance doesnt update? The Maintenance service normally only needs to be updated with a new major Firefox (e.g.date for firefox update is 5/6/2017 the maintenance update is 4/5/2017. date for firefox update is 5/6/2017 the maintenance update is 4/5/2017. 53 to 54) and is always the version of the highest Firefox version in case you would have/had more then one version installed.If you want, you can; do a full clean re-install; Download Firefox For All languages And Systems Save the file. Using your file browser, open the Programs Folder on your computer.Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder.