NextGen Bright
NextGen Bright is a BigCommerce theme by Lonestar Templates ($195). Tested on 2026-11-10 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 66 for mobile speed and 72 for desktop speed, 90/90 for SEO and 87/82 for accessibility (mobile/desktop, 0–100).
Mobile54

Desktop75

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 66 | 72 |
| SEO | 90 | 90 |
| Accessibility | 87 | 82 |
| Best practices | 68 | 72 |
Single preset · measured 30 times since 2026-11-07 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — NextGen-Bright home page
Mobile
Speed 54 · 46 points to gain
- −23.8 Cumulative Layout Shift medium effort
- −19.5 Largest Contentful Paint medium effort
- −1.6 Speed Index medium effort
- −0.8 First Contentful Paint medium effort
- −0.6 Total Blocking Time medium effort
- 540 ms Reduce unused CSS high effort
- 460 ms Reduce unused JavaScript high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 93 · 7 points to gain
- −3.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.1 Touch targets do not have sufficient size or spacing. medium effort
- −1.3 Document does not have a main landmark. medium effort
Best practices 77 · 23 points to gain
- −19.2 Uses deprecated APIs medium effort
- −3.8 Serves images with low resolution low effort
Desktop
Speed 75 · 25 points to gain
- −22.3 Cumulative Layout Shift medium effort
- −2 Largest Contentful Paint medium effort
- 120 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 85 · 15 points to gain
- −4.3 Input buttons do not have discernible text. medium effort
- −3 `[aria-hidden="true"]` elements contain focusable descendents medium effort
- −3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3 Touch targets do not have sufficient size or spacing. medium effort
- −1.3 Document does not have a main landmark. medium effort
Best practices 81 · 19 points to gain
- −19.2 Uses deprecated APIs medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| NextGen-Bright default demo ↗ | 66 | 90 | 87 | 72 | 90 | 82 | 2026-11-07 |
| category ↗ | 96 | 92 | 90 | 78 | 92 | 85 | 2026-11-10 |
| home ↗ | 54 | 92 | 93 | 75 | 92 | 85 | 2026-11-07 |
| product ↗ | 48 | 85 | 78 | 64 | 85 | 76 | 2026-11-10 |