Hi! Even if i'm an old user of Firefox, i'm new to this support/forum thing, so I apologise if i'm in the wrong place. Today, after watching some videos on a specific youtube channel, i noticed that the channel appeard on the "highlights" section in the home page of Firefox. Nothing strange in that, but i noticed that the thumbnail of the user of that youtube channel was in high definition in the "highlights", even if when I viewed the page information of YouTube, on the media tab, I wasn't able to find an image with such an hight resolution. I would be clear: I'm not talking about the YouTube red logo, but on the user's channel image (rounded, near the name). The "moz-page-thumb://thumbnails/?url........" have a resolution of 448px x 448px. The image on youtube have the maximum resolution of 176px x 176px. So... Where have Firefox finded that image?? Is there involved some kind of upscaling?? I really appreciate the hard work of Mozilla, and I hope that will go on on this way.