going from V3 to V4 could brick the NVR
Yes, but only if too big a jump to the V4.x version is attempted.
Hikvision published an advisory how the update should be handled.
Here is Edge in Win10 on a K2-series, almost the same hardware as your I-series NVR, using firmware V4.71.005 build 220524
You can see that Edge is not running in IE-mode either, no plugins.