Tutorial Chrome Plugin for Checking Consent Mode v2 Implementation

Introduction

Want to simplify checking consent mode v2? Build a Chrome plugin! Here’s a beginner-friendly guide to get started.

NOTE

What is a Chrome Plugin

A Chrome plugin (or extension) extends browser functionality. It can interact with web pages, making it ideal for automated tools like a CM v2 checker.

Changes in Chrome Plugins Manifest v3

Chrome’s manifest v3 introduces:

Service workers: Replaces background pages for improved performance and security.
DeclarativeNetRequest: Provides safer ways to intercept and modify network requests.

Getting started

Set up your project folder:
- Create a folder named consent-mode-checker.

Add manifest.json:

{
  "manifest_version": 3,
  "name": "Consent Mode Checker",
  "version": "1.0",
  "permissions": ["activeTab"],
  "background": {
    "service_worker": "background.js"
  }
}

Create background.js:

chrome.runtime.onInstalled.addListener(() => {
    console.log("Consent Mode Checker installed");
});

Load your extension:
- Open Chrome’s Extensions page (chrome://extensions).
- Enable Developer Mode and click Load unpacked.
- Select your folder.

Step 2 (coming soon)

In the next step, we’ll add logic to detect data-gcm-version="2.0" and related parameters directly on web pages.

TL;DR

Chrome plugins are a powerful way to automate tasks. Start by setting up a basic plugin, then expand its functionality to check for consent mode v2 specifics.

Building a Chrome Plugin to check Consent Mode v2