That folder should be confined to a special folder somewhere in the deep.
One would expect that the browser clears this folder automatically. For my Olde Opera, it wasn't exactly each time on exit, but it was regularly. So check it out - and maybe chillax, in the sense of not worrying too much.
Myself even created a desktop shortcut for that folder in yonder days so that I could get easy access, use files and clean it. So in a sense, you're lucky :jester: (however it's not normal).
I had to turn off hardware acceleration to put google maps in Traffic mode. With HWA on, refreshing the page would show the map, overlay the traffic colors, then remove the traffic colors. When I searched google for a fix, turning off HWA was suggested, and worked. But with HWA off, I get the flashing hourglass and maps is very, very slow, if it responds at all.
Thanks for your response Leo, and I now understand why WebRTC is not checked when receiving updates and have ensured my machines have 'Disable non-proxied UDP' checked. 🙂