When opening a e-mail in webmail within Firefox the new window (popup) has about the size of the button on the top and that's it. The body/text of the mail is not visible and Firefox won't let you resize to see it.
I noticed the issue first a couple of versions ago with the Firefox BETA. Since it was only in the BETA, I didn't give it more thought. However, it seems the issue came into the latest stable version 31.0.
Is there something SmarterMail can do? Or perhaps can I resolve this by configuring my IIS 8?
PS: Current workaround is to set browser.link.open_newwindow.restriction to 0 so the Firefox opens a new tab instead of a window.