Which browser extension works best for sharing Amazon UK carts?

omg so im super excited because im finally organizing the big family reunion for my parents 40th anniversary and it is gonna be huge!! we are doing it in London next month and i have like 40 items in my amazon uk cart already like banners and those tiny fairy lights and stuff but my sister is being really picky about the budget since we are trying to keep it under 300 pounds total. i really need her to look at what i picked out but i cant figure out how to just send her the whole cart? i feel so silly asking this because i barely know how to use my computer for more than emails but someone told me there are things called browser extensions that can do this for you? i have no idea where to start or if they even work for the uk site specifically because usually everything i find online is for the us version. i dont want to mess up my computer or get a virus or anything so i am kinda nervous about it. do i just download something? is there one that is really easy for someone who is basically a tech dinosaur? which extension actually works best for sharing amazon uk carts without being super complicated??