Using My Imac [Make an offer] Does not work with Firefox. Fine with Safari. Reloaded Firfox,no help.

[atomicagetoys]

Been like this a week, Cleared Cache, reloaded Firefox. No change. This is what opens when Make an offer is selected. 

[wastingtime101]

I just checked and I'm not having any issues using make an offer on Firefox on a Mac from the item page.

Have you tried temporarily disabling any browser extensions?