Manifest Build
Manifest Build is a BigCommerce theme by Gordonbyte ($149.99). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 67 for mobile speed and 81 for desktop speed, 77/77 for SEO and 80/80 for accessibility (mobile/desktop, 0–100).
Mobile66
Desktop73
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 67 | 81 |
| SEO | 77 | 77 |
| Accessibility | 80 | 80 |
| Best practices | 99 | 97 |
Single preset · measured 6 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Manifest-Build home page
Mobile
Speed 66 · 34 points to gain
- −15.5 Largest Contentful Paint medium effort
- −10.5 Cumulative Layout Shift medium effort
- −5.7 First Contentful Paint medium effort
- −1.3 Speed Index medium effort
- −0.9 Total Blocking Time medium effort
- 300 ms Reduce unused CSS high effort
- 300 ms Reduce unused JavaScript high effort
SEO 77 · 23 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Links are not crawlable medium effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 78 · 22 points to gain
- −4.9 Image elements do not have `[alt]` attributes low effort
- −3.4 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3.4 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.4 Links do not have a discernible name medium effort
- −3.4 List items (`<li>`) are not contained within `<ul>`, `<ol>` or `<menu>` parent elements. low effort
- −3.4 Touch targets do not have sufficient size or spacing. medium effort
Desktop
Speed 73 · 27 points to gain
- −18.9 Total Blocking Time medium effort
- −3.8 Cumulative Layout Shift medium effort
- −2.3 Speed Index medium effort
- −1.7 Largest Contentful Paint medium effort
SEO 77 · 23 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Links are not crawlable medium effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 78 · 22 points to gain
- −4.9 Image elements do not have `[alt]` attributes low effort
- −3.4 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3.4 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.4 Links do not have a discernible name medium effort
- −3.4 List items (`<li>`) are not contained within `<ul>`, `<ol>` or `<menu>` parent elements. low effort
- −3.4 Touch targets do not have sufficient size or spacing. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Manifest-Build default demo ↗ | 67 | 77 | 80 | 81 | 77 | 80 | 2026-09-11 |
| category ↗ | 85 | 77 | 83 | 99 | 77 | 86 | 2026-09-12 |
| home ↗ | 66 | 77 | 78 | 73 | 77 | 78 | 2026-09-11 |
| product ↗ | 50 | 77 | 79 | 70 | 77 | 76 | 2026-09-12 |
Show this score on your site
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<a href="https://themestested.com/theme/bigcommerce/manifest-build"><img src="https://themestested.com/badge/bigcommerce/manifest-build.svg" alt="Manifest Build speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.