This site appears to use a scroll-linked positioning effect. This may not work well with asynchronous panning; see https://firefox-source-docs.mozilla.org/performance/scroll-linked_effects.html for further details and to join the discussion on related tools and features!
Zda so, zo sydło pozicioněrowanski efekt wužiwa, kotryž je z kulenjom zwjazany. To snano z asynchronym přesuwanjom porjadnje njefunguje; hlejće https://firefox-source-docs.mozilla.org/performance/scroll-linked_effects.html za dalše podrobnosće a zo byšće so diskusiji wo podobnych nastrojach a funkcijach přidružił!