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Upgrade (and do annotation) for Chrome 73 and Firefox 66 in our testing
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Description

Chrome 73 was pushed last week in WebPageTest (I marked with an annotation), Firefox and Chrome updated with WebPageReplay the 19th of March.

One thing I think we can say so far is that FF 66 seems to give us faster onLoad for some pages (this is enwiki/Facebook):

Firefox66-enwiki-facebook.png (1×1 px, 140 KB)

I'll do a summary of metric changes later this week when latest FF is on WPT and I got more time to look at the Chrome metrics.

Event Timeline

Adding example HARs for 66 and 65.


The current run on WebPageTest got Firefox 66 so I marked an annotation. However we don't graph navigation timing data (or collect it by default) so I think we need to compare individually runs.

For Chrome we could see different behavior but nothing concistent. I've added annotations on all places so if we see something in RUM we can go back to the synthetic.