I was using V5.7.2 build 211109.
The camera has updated itself to the new firmware. I happened to notice this and then turned off the camera and restarted it. And now there is a new firmware V5.7.17 build 240606.
Now everything is fine and the browser itself is fixed and the camera works fast and smooth.
I didn't notice this before.
AcuSearch -" After the function is enabled, the ongoing smart application will be disabled while Smart Event or Multi-Target-Type Detection will be enabled. "
Smart supplemental light, when the camera is turned on, it tries to activate something and the image darkens and then brightens again.