Hi,
First just to make sure there are no 3rd party scripts making any funky stuff, please make sure that:
– No other plugins are active
– The default theme is active, without any custom code
If still no luck, then there are two other things to look at:
– Browser extensions. Try disabling them one by one. I have had issues on localhosts when certain extensions tried to do their stuff, but the local domain made them fail.
– Local overrides. This is a chrome specific feature, and can be very very problematic. I had this same issue (although not plugin related), where I visited a certain site and it just kept crashing. I lost my mind to figure it out why. I had local overrides active, basically messing up everything.