How do I turn off the “Add search provider” bar?

Using firefox on my iphone 7, latest version. When I try to use a search engine within a site, like Walmart Grocery, an aggressive and reoccuring popup asks me if I want to add a search provider to my browser. I don’t, but whether I add it or cancel the window, it comes up again as soon as I scroll to view my search results on the original page. I see no option to turn it off. Turing off search suggestions does not make it go away either. About to switch back to Chrome where I never had reoccuring un-turn-off-able pop ups. I have a pic for reference if needed.