Hi. Not sure what's wrong. But I'm currently using Firefox 53.0.3 (32-bit) and having issue with eBay and Nimbus screen capture addon.
If I have the screen capture addon enabled and browsing ebay, once I type anything into eBay search bar and press Search, nothing happens, I have to click Refresh to go to new page. And once I disabled those addons, there is no issue with eBay again
Customer support service by UserEcho