Lighthouse

How to Fix Lighthouse Issues

Step-by-step guides for the most impactful Google Lighthouse audits. Each guide explains the issue, walks through the manual fix, and shows how Frontman handles it automatically.

Performance

Performance

How to Fix Total Blocking Time (TBT)

Total Blocking Time measures how long the main thread is blocked during page load. Learn how to identify long tasks and reduce TBT below the 200 ms threshold.

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Performance

How to Fix Cumulative Layout Shift (CLS)

Cumulative Layout Shift measures unexpected visual movement on the page. Learn how to find layout shift sources and eliminate them for a score under 0.1.

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Performance

How to Fix Largest Contentful Paint (LCP)

Largest Contentful Paint measures how long the biggest visible element takes to render. Here is how to diagnose slow LCP and bring it under the 2.5-second threshold.

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Performance

How to Fix First Contentful Paint (FCP)

First Contentful Paint measures how quickly any content appears on screen. Learn how to eliminate delays and get FCP under 1.8 seconds.

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Performance

How to Fix Speed Index

Speed Index measures how quickly the visible content of a page is populated. Learn how to improve visual completeness during load and lower your Speed Index score.

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Performance

How to Fix Image Size and Format Issues

Lighthouse flags images that are too large, incorrectly sized, or served in outdated formats. Learn how to optimize images for faster loading and better scores.

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Performance

How to Fix Render-Blocking Resources

Render-blocking resources prevent the browser from painting content until they finish loading. Learn how to identify and eliminate them to speed up your page.

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Performance

How to Fix Unminified JavaScript

Lighthouse flags JavaScript files that contain unnecessary whitespace, comments, and long variable names. Learn how to minify your scripts and reduce transfer size.

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Performance

How to Fix Unminified CSS

Lighthouse flags CSS files that contain unnecessary whitespace and comments. Learn how to minify your stylesheets and reduce transfer size.

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Performance

How to Fix Unused JavaScript

Lighthouse flags JavaScript that is downloaded but never executed during page load. Learn how to identify dead code and reduce your JavaScript bundle size.

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Performance

How to Fix Unused CSS

Lighthouse flags CSS rules that are downloaded but never applied during page load. Learn how to audit stylesheets and remove dead CSS to improve performance.

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Stop fixing Lighthouse issues manually

Frontman runs Lighthouse audits inside the browser, reads the results, and fixes the issues — all in one session. No tab switching. No copy-pasting audit output.