Post problem

I have been trying to post something for the last hour, its in the smaller RP group and whenever I try to "Post Reply" the site freezes for 5 seconds, and it reverts back to the thread without any sign of me posting it.
I can't restart my computer, as I'll lose the images I have on firefox.
It'd greatly help if you helped, as considering I've been waking up the neighbours shouting at my computer for the last hour. :\

 

Try to save the images in a backup folder on your desktop, then open them up inside your Firefox again?

Try to disconnect and reconnect your internet?

Or punch your internet.