Must reads for web developers - how modern browsers work:

1️⃣ bit.ly/browsers-pt1
2️⃣ bit.ly/browsers-pt2
3️⃣ bit.ly/browsers-pt3
4️⃣ bit.ly/browsers-pt4

and browser.engineering a free to read book on the topic

Random insight: The website was slower because of the theme picker. Why?

The site had a color and background transition (not GPU accelerated) on the theme picker for when a selection is made.

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