Starting June 2024, adblockers such as uBlock Origin and many other extensions on Chrome will no longer work as intended. Google Chrome will begin disabling extensions based on an older extension platform, called Manifest V2, as it moves to the more limited V3 version.
How the WebRequest API works is:
This is slow and will always be. Their change to remove blocking makes steps 2-4 a copy of the data instead of a synchronous call.
Now an ad can be slower, just by more data or bad JS. But that isn’t Googles concern because they sell those ads.
Ahhhh gotcha, thanks!