You can find how long uBO took to be all ready after launch in the Support pane in the dashboard, the value of allReadyAfter in the troubleshooting information. I suspect this could be caused by a variety of factors, like low performance devices, and/or having a lot of other extensions beside uBO.
I have seen reports of uBO taking a long time to be ready at launch, for unknown reasons.
I closed all the tabs again and opened YouTube, and somehow the ads are gone for now.Ĭhromium-based browsers won't wait for uBO to be ready when opening tab(s) immediately after browser launch, and this sounds like this is the issue.
