Diễn đàn hỗ trợ Firefox

H!

For a long time now, at least a year, I cannot change the sort priority for search results on Amazon. Whenever I try to change to any other sort method other than Featured, the page just reloads and switches right back to Featured results. It happens on all my computers. I know this is a Firefox issue because this doesn't happen when I search Amazon with Chrome or on the Amazon app.

Anyone got an idea what's going on here?

I used this a lot, but now cannot find it on any toolbar. I've added no software or made any changes in the interim. I was hospitalized from 1/10 to 1/31, and didn't use my computer in that period. I updated Firefox, and still can't find the control.