Makes me think of this ticket no work around for the error other than closing the browser and editing a file or modifying the browser and recompiling. No options at all in the advance settings.

https://bugzilla.mozilla.org/show_bug.cgi?id=1528738

It's stuff like this that makes me unhappy with mozzilla. User's who know what they are doing should be permitted to do so. Warn them here be dragons or whatever, but it's ultimately their choice.