Hi
I have the same problem. Rosylana.com. Thanks!
Google says remove unused javascript, what can I do about it?
Topic summary
Core Issue:
Shopify store owners struggle with leftover code from uninstalled apps that slows page speed. No automated app exists to clean this code.
Key Findings & Solutions:
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Shopify’s New Requirements: As of ~2 months ago, Shopify requires apps to provide automatic code removal upon uninstallation. Users should reinstall apps briefly to check for cleanup buttons.
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Diagnostic Approach: Use Chrome DevTools (right-click → Inspect → Network tab) to identify slow-loading resources and trace them to specific apps or theme files.
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Common Culprits:
- Facebook Pixel requests (often duplicated, sometimes 3+ instances)
- Review apps (Ali Reviews, Judge.me, Yotpo, Opinew)
- Loyalty/rewards programs
- Chat widgets and email marketing tools
- Unused CSS/JavaScript from themes
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Recommended Actions:
- Contact app developers for optimization help
- Add
loading="lazy"to image tags for lazy loading - Search theme files for app references using text editors
- Consolidate duplicate pixels/tracking codes
- Remove unused apps completely following developer uninstall guides
Important Caveats:
- Some JavaScript loads after main page (via Shopify script tags), so doesn’t actually slow initial load despite Google reports
- Theme core files shouldn’t be modified without expertise
- Google Lighthouse scores simulate slow connections and may not reflect real user experience
- Professional developer help recommended for complex code removal