[CFrance]

I wish I could have come up with a more explanatory title to explain the help I'm seeking--apologies in advance.
I'm trying to find flights to Australia to visit family. Yesterday the premium economy return (i.e, round trip) flights were about $4K. Today on the same sites they're $5K+. I have heard that through tracking "they," whoever "they" is, know you're looking and raise the prices. (I've had this happen before: example, when searching for a 7-lb medical weight bar, it was $40 one day and $80 the next, whereas the 8-lb bar was $40. for the same bar on the same site on both days. But I hadn't clicked on the 8-lb bar.)


I thought I heard there was a way to do a new search for the same thing and have your prior search not visible to the sites. I'm sure I'm not using the right terminology, but any help would be appreciated.
FYI, I use a Dell Windows 11 and Firefox, although we do have an Mac Pro that we use to Face Time the grandkids. So possibly I could just switch computers?