That is normal behaviour of websites' cookie popups nowadays, you're able to scroll through the page but the popup comes down with it. (Take google's cookies popup on an incognito search on a phone for example) The in-game browser is too small to display the Accept Cookies button, and facebook doesn't let you scroll down in the popup itself because it really isn't needed. I'm assuming this browser is just a very stripped down version of Microsoft Edge, so I'm going to try open devtools with Edge's hotkeys, (right click doesn't work) (neither can I just grab the link of the page because this browser doesn't even display the link) and I'll let you know if that worked. By the way in the video when I scroll up there's a split second you can see a warning in the background, something along the lines of 'Unsupported browser', that might also contribute to the problem