Lightswitch dates in Firefox displayed incorrectly

Does anyone know why all dates display in the correct (UK based) dd/MM/yyyy format in Chrome and IE but in Firefox are set to MM/dd/yyyy format?

Is there a workaround other than converting every date display to a custom control and using moment.js to render the date into the required format?

PC is set to UK location in Control Panel. Thanks

Solution

Having encountered the same issue, and following some rabbit hole exploration in the msls library, we determined that the solution is to ensure the setting selected on the Firefox options\languages screen is "English/United Kingdom [en-gb]" as shown in the following example: -

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