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Browser Extensions Development (Chrome & Edge) · Lesson

Versioning, Updates & Post-Launch Maintenance

Manage version numbers, ship updates safely after launch, and respond to user reviews and store policy changes.

Versioning, Updates & Post-Launch Maintenance is a free Browser Extensions Development (Chrome & Edge) lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Browser Extensions Development (Chrome & Edge) learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Launch Is the Beginning

Getting accepted to the store is just the start. Real success comes from steady updates, responsive support, and staying compliant as policies evolve.

Semantic Versioning

The manifest version must increase with every update. A common scheme is MAJOR.MINOR.PATCH to communicate the size of a change.

{
  "version": "1.4.2"
}

Version Must Always Increase

Stores reject an upload whose version is not higher than the published one. Bump it before every submission, even for tiny fixes.

// 1.4.2 -> 1.4.3 for a hotfix

Auto-Update Mechanics

Once you publish a new version, browsers fetch and install it automatically within hours. Users do not need to do anything.

This makes a broken release dangerous, so test thoroughly.

Staged Rollouts

Both stores let you release to a percentage of users first. Roll out to a small slice, watch for crash reports, then expand.

// Start at 10%, then 50%, then 100% if stable

Detecting the Update in Code

Use the onInstalled event to run migrations or show a what's-new page when the version changes.

chrome.runtime.onInstalled.addListener((d) => {
  if (d.reason === 'update') {
    runMigrations(d.previousVersion)
  }
})

Migrating Stored Data

When your data shape changes between versions, migrate old stored values on update so existing users do not break.

async function runMigrations(prev) {
  if (prev && prev.startsWith('1.')) {
    // reshape old settings here
  }
}

Maintaining a Changelog

Keep a public changelog and update the store listing notes each release. Users trust extensions that communicate clearly about changes.

Responding to Reviews

Reply to store reviews, especially negative ones. A thoughtful reply and a follow-up fix can turn a one-star reviewer into a loyal user.

Staying Policy Compliant

Store policies change. Periodically re-read the developer policies, tighten permissions, and update your privacy disclosures to avoid sudden removal.

Handling Deprecations

Browser APIs get deprecated over time. Watch developer announcements and migrate before removed APIs break your extension for everyone.

Quick Check

Test your maintenance knowledge.

Recap

You learned post-launch maintenance:

  • Bump the manifest version every release
  • Use staged rollouts and test before publishing
  • Run migrations in onInstalled
  • Keep a changelog and reply to reviews
  • Stay compliant and ahead of deprecations

Consistent maintenance keeps your extension healthy long after launch.

Frequently asked questions

Is the “Versioning, Updates & Post-Launch Maintenance” lesson free?

Yes — the full text of “Versioning, Updates & Post-Launch Maintenance” is free to read here on the web, and the Browser Extensions Development (Chrome & Edge) course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Browser Extensions Development (Chrome & Edge) course, upgrade to CoddyKit PRO.

What will I learn in “Versioning, Updates & Post-Launch Maintenance”?

Manage version numbers, ship updates safely after launch, and respond to user reviews and store policy changes. You practise Browser Extensions Development (Chrome & Edge) with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Browser Extensions Development (Chrome & Edge)?

No prior experience is required. Browser Extensions Development (Chrome & Edge) on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “Versioning, Updates & Post-Launch Maintenance” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Browser Extensions Development (Chrome & Edge) lesson?

Yes. Every Browser Extensions Development (Chrome & Edge) lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Preparing for Store Submission
  2. Chrome Web Store Guidelines
  3. Edge Add-ons Store Submission
  4. Versioning, Updates & Post-Launch Maintenance
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