- using monitorEvents like the Spy++ using in old days to monitor event triggered on an element
 
- by pressing CTL+F, you can use element/css/xpath selector to select the right element.
 
- in the timeline of network tab, you can sort by the latency that find which site’s DNS sucks (latency)
 
- besides javascript breaks, you can setup DOM breaks.
 
wheneven this is one change, it will break and stop
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