i still have no clue why people use chrome for the past 5+ years, there's better chromium alternatives if you still want to use chromium for some reason, and there's firefox which doesn't support the chromium monopoly, works really well and doesn't try to restrict you from using adblockers
File picker and file and file manager are differential. Just a few days i swapped to Firefox and itcstill used the old gnome file picker even though other vrowsers use they dolphin one on my distro.
Only the GNOME/GTK file picker did not display thumbnails for a while, but this functionality has now been available in all file pickers for some time.
Well the GNOME team fixed tge newest version but that didn't cause all the distros to start using it. My version of Firefox still used the old one a few days ago even when my otger browsers use a modetn dolphin file picker