JetBlack Music
JetBlack Music is a WordPress theme by Firefly Themes (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 76 for mobile speed and 98 for desktop speed, 50/50 for SEO and 89/91 for accessibility (mobile/desktop, 0–100).
Mobile76
Desktop98
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 76 | 98 |
| SEO | 50 | 50 |
| Accessibility | 89 | 91 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — JetBlack Music home page
Mobile
Speed 76 · 24 points to gain
- −20.8 Largest Contentful Paint medium effort
- −3 First Contentful Paint medium effort
- 150 ms Minify CSS low effort
- 150 ms Reduce unused CSS high effort
SEO 50 · 50 points to gain
- −40.3 Page is blocked from indexing low effort
- −10 Document does not have a meta description low effort
Accessibility 89 · 11 points to gain
- −5.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −5.3 Links rely on color to be distinguishable. medium effort
Desktop
Speed 98 · 2 points to gain
- −2 Largest Contentful Paint medium effort
SEO 50 · 50 points to gain
- −40.3 Page is blocked from indexing low effort
- −10 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −4.5 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −4.5 Links rely on color to be distinguishable. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| JetBlack Music default demo ↗ | 76 | 50 | 89 | 98 | 50 | 91 | 2026-09-13 |
| home ↗ | 76 | 50 | 89 | 98 | 50 | 91 | 2026-09-13 |
Show this score on your site
A live badge: it always shows JetBlack Music's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/jetblack-music"><img src="https://themestested.com/badge/wordpress/jetblack-music.svg" alt="JetBlack Music speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.