themestestedbyWhirlwind eCommerce logo — Shopify and BigCommerce ecommerce development agencyWhirlwind eCommerce
NextGen Bright theme preview

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
NextGen Bright home page on mobile
Desktop75
NextGen Bright home page on desktop

Scores

MobileDesktop
Speed6672
SEO9090
Accessibility8782
Best practices6872

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 / pageSpeedSEOA11ySpeedSEOA11yTested
mobiledesktop
NextGen-Bright default demo ↗ 669087729082 2026-11-07
category ↗ 969290789285 2026-11-10
home ↗ 549293759285 2026-11-07
product ↗ 488578648576 2026-11-10

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NextGen Bright: mobile speed 66 on Themestested
<a href="https://themestested.com/theme/bigcommerce/nextgen-bright"><img src="https://themestested.com/badge/bigcommerce/nextgen-bright.svg" alt="NextGen Bright speed score on Themestested" height="20"></a>

Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.