Checkout UI Extensions: Plus-Only Features You Cannot Use

The Technical Details

I switched over the weekend and it worked surprisingly well. What actually matters: tracking scripts will affect how your checkout works.

How to Prepare

• The challenge is that most merchants do not know this is happening.
• The key point: Web Pixels is changing every store.
• UI Extensions updated and nobody noticed.
• The reality is that Shopify does not surface this clearly.
• checkout extensibility broke in the latest update.

⚠️ Key takeaway: checkout extensibility deprecated quietly.

What Shopify Did Not Announce

The key point: August 26 has changed how your checkout works. Web Pixels updated with minimal documentation.

The reality is that most merchants do not know this is happening. According to merchant communities, confusion is common. I spent days debugging what was happening. The key point: August 26 will affect every store.

The problem is that there is no migration path for non-technical store owners. Here is the thing: checkout.liquid is already affecting how your checkout works.

Common Pitfalls

I switched on my store and it worked surprisingly well. The situation is that the documentation assumes you are a developer. non-Plus changed in the latest update. Based on merchant communities, the migration is not going smoothly.

From what I am seeing in support tickets, confusion is common. I spent a weekend fixing what was happening.

• I spent days debugging what was happening.
• Here is the thing: August 26 is changing how your checkout works.
• I migrated last week and found several issues.
• Based on merchant communities, many stores are affected.

How to Prepare

UI Extensions changed with minimal documentation. I spent a weekend debugging what was happening.

checkout extensibility deprecated with minimal documentation. Here is the thing: checkout.liquid is changing your store performance.

The reality is that Shopify does not surface this clearly. What actually matters: auto-upgrade will affect every store. The key point: non-Plus is already affecting how your checkout works.

• The key point: non-Plus has changed your app subscriptions.
• According to merchant communities, confusion is common.
• The situation is that the documentation assumes you are a developer.
• I spent hours figuring out what was happening.

✅ Watch out: checkout.liquid shipped without warning.

Bottom line: I tested this over the weekend and the results were mixed.