Proboards is resizing my Firefox window on it's own

[Zephyr]

I'm not sure why, but I'm viewing Proboards in a windowed Firefox. However if I try to resize it wider, it jumps very tall vertically. And from then on I can only resize it horizontally. Even if I close the Proboards tab, it refuses to allow me the resize until I close Firefox entirely and open it up in a new window.

From checking some other websites, it seems only Proboards is having this effect.

Anyone have any idea why it's doing this?

Edit: Forget it. It's stopped now. I don't know why it started, or why it as suddenly stopped. I know it happened even after I closed Firefox though. But now suddenly it works fine. Very strange.

[Thomasss]

Very odd, Glad it all worked out on it's own! Let us know if this happens again!!