Does this guide cover executeScript changes?

Yes, it provides patterns for moving from the tab-based executeScript (MV2) to the newer chrome.scripting.executeScript (MV3) which supports passing functions and arguments.

How do I handle state if service workers terminate?

Because service workers are ephemeral, you must use the chrome.storage API (such as chrome.storage.session or chrome.storage.local) to persist state and restore it when the worker restarts.

What are the biggest changes in Manifest V3?

The most significant changes include the replacement of background pages with service workers, the transition from the blocking webRequest API to declarativeNetRequest, and the prohibition of remotely hosted code.

Can I still use eval() or external scripts in MV3?

No, Manifest V3 enforces a strict Content Security Policy that disallows remotely hosted code. All logic, including libraries, must be bundled locally within the extension package.

Chrome Extension MV3 Migration Guide

Name: Chrome Extension MV3 Migration Guide
Author: francanete

byfrancanete

ブラウザ自動化

Guides developers through the process of migrating Chrome extensions from Manifest V2 to Manifest V3 using modern patterns and best practices.

概要

This skill provides a comprehensive roadmap for upgrading legacy Chrome extensions to the Manifest V3 (MV3) standard. It offers detailed implementation guidance for complex transitions, such as converting persistent background pages into ephemeral service workers, replacing blocking webRequest calls with the declarativeNetRequest API, and removing remote code execution. By providing standardized code patterns for persistence, script execution, and host permissions, it helps developers ensure their extensions remain performant, secure, and compliant with the latest browser requirements.

主な機能

DeclarativeNetRequest rule implementation for network filtering
0 GitHub stars
Secure script execution patterns using the chrome.scripting API
Service worker transition guide with state persistence patterns
Manifest V2 to V3 property mapping and schema updates
Step-by-step migration checklist for quality assurance

ユースケース

Upgrading legacy extensions to maintain Chrome Web Store compliance
Migrating network blocking logic from webRequest to declarative rules
Refactoring background scripts into event-driven service workers

概要

主な機能

DeclarativeNetRequest rule implementation for network filtering
0 GitHub stars
Secure script execution patterns using the chrome.scripting API
Service worker transition guide with state persistence patterns
Manifest V2 to V3 property mapping and schema updates
Step-by-step migration checklist for quality assurance

ユースケース

Upgrading legacy extensions to maintain Chrome Web Store compliance
Migrating network blocking logic from webRequest to declarative rules
Refactoring background scripts into event-driven service workers