“This leads to numerous reports of "uBlock stopped working", which are simply caused by the fact that at launch time the browser started to load webpages before uBO was ready to filter properly (because the filter lists were not fully loaded in memory).”
Chromium starts loading pages before uBlock Origin has its filter lists in memory, and it got worse in Chromium 110. Firefox lets the extension hold network traffic until it’s ready and does so by default. On Chromium the same setting is optional and off. So uBO now paints its icon yellow to show users the gap Google’s browser leaves open.