One of my fav features of firefox was Page Info > Media to save images off instagram. I know there are other ways to do this but recently it seems to have broken on its own and its bothering me. I used the feature to download some videos (not from instagram) and then put them on a USB. I've done this before minus the USB and it didn't affect anything. The next time I went to instagram image previews are broken. They also say size unknown / not cached, leading me to believe it might be a cache issue. I've tried numerous solutions and nothing has fixed it. I'm not sure if this is on my end, or a recent change on instagram's end and its just a coincidence of the timing.