Browser & Web Performance · Junior · Question 12 of 75

What is the browser's preload scanner?

1A tool that scans the page for malware
✓Correct answer: A secondary parser that finds resources like images and scripts in the HTML ahead of the main parser and starts fetching them
3A DevTools panel that lists preloaded fonts

Explanation

It lets downloads start even while the main parser is blocked. Resources hidden in JS or CSS (e.g. injected images) can't be discovered by it.

Further reading

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