[quote=@Mahz]
Just to re-up my intel, is this is only an issue on your Firefox 38 on [desktop] Linux device?
[/quote]

Just going to point out that this hasn't been an issue on my Linux install, so I frankly have no idea what could be causing it, unless it is specific to Shienvien's distro. (I'm using Linux Mint Cinnamon, version 17.1/whatever the newest version was when I last booted into it, and latest firefox at the time) I'd be extremely surprised if it was a problem specific to their device(s) but I haven't experienced it, so it must be some obscure bug I'd think.