I am using Firefox on Win 11, recently I have noticed a weird problem, on Ebay for example when a listing uses a drop down selection box for sizes, amounts etc none of them work for me, I click on the box and down arrow but nothing. I also went on to the Vodafone site to top up my phone but I was unable to do it as the drop down box to select the amount was empty. I have tried clearing my cache and even reloading Firefox but nothing seems to work, I just tried using Edge as well but its the same, suggesting that its maybe something to do with my settings?