Comment 2 for bug 1593248

The functionality of the 'All Swift Drives' will only check drives that have been formatted and mounted. This checkbox does not check drives that are 'Available' to be formatted and mounted - that is the purpose of the 'checked box icon' in your screenshot.

What version of firefox was used with the disappearing check box issue? I will report this to our team.

Overall, thank you for reporting the issue with the UI. However, this issue does not pertain to the plugin itself.