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

0•

浏览器自动化

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

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.

主要功能

01DeclarativeNetRequest rule implementation for network filtering

020 GitHub stars

03Secure script execution patterns using the chrome.scripting API

04Service worker transition guide with state persistence patterns

05Manifest V2 to V3 property mapping and schema updates

06Step-by-step migration checklist for quality assurance

使用场景

01Upgrading legacy extensions to maintain Chrome Web Store compliance

02Migrating network blocking logic from webRequest to declarative rules

03Refactoring background scripts into event-driven service workers

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add francanete/fran-marketplace migration-guide

For use in Claude.ai and ChatGPT

Download Skill