Introduction

Before Selenium Manager was introduced in Selenium 4.6, managing browser drivers was one of the most common challenges in Selenium automation. Testers had to manually download browser drivers such as ChromeDriver, GeckoDriver, and EdgeDriver whenever their browsers were updated.

To solve this problem, WebDriver Manager was developed. It is a third-party library that automatically downloads, configures, and manages browser drivers, eliminating the need for manual driver management.

Although Selenium Manager is now the recommended solution for modern Selenium projects, WebDriver Manager is still widely used in existing automation frameworks and enterprise projects. Therefore, understanding WebDriver Manager is important for both real-world automation and Selenium interviews.

In this tutorial, you’ll learn what WebDriver Manager is, how it works, how to install and use it in Python, its advantages, limitations, and how it compares with Selenium Manager.

What is WebDriver Manager?

WebDriver Manager is a Python library that automatically downloads and manages browser drivers required by Selenium WebDriver.

Instead of manually downloading browser drivers and configuring their paths, WebDriver Manager performs these tasks automatically.

It supports major browsers such as:

Google Chrome
Mozilla Firefox
Microsoft Edge
Opera

Why Use WebDriver Manager?

Before WebDriver Manager, automation engineers had to:

Download browser drivers manually
Keep drivers updated
Configure system PATH variables
Match browser versions with driver versions

These tasks were repetitive and often caused automation failures.

WebDriver Manager automates these tasks, making Selenium project setup much easier.

How WebDriver Manager Works

The workflow is:

Python Script
       │
       ▼
WebDriver Manager
       │
       ▼
Detect Browser Version
       │
       ▼
Download Compatible Driver
       │
       ▼
Configure Driver Path
       │
       ▼
Launch Browser

When your Selenium script runs:

WebDriver Manager detects the installed browser version.
It downloads the compatible browser driver if required.
The driver path is configured automatically.
Selenium launches the browser.

Installing WebDriver Manager

Install WebDriver Manager using pip.

pip install webdriver-manager

After installation, you can import it into your Selenium project.

Using WebDriver Manager with Google Chrome

The following example launches Google Chrome using WebDriver Manager.

from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from webdriver_manager.chrome import ChromeDriverManager

driver = webdriver.Chrome(
    service=Service(ChromeDriverManager().install())
)

driver.get("https://example.com")

print(driver.title)

driver.quit()

Output

Example Domain

WebDriver Manager automatically downloads the correct version of ChromeDriver if it is not already available.

Using WebDriver Manager with Firefox

from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from webdriver_manager.firefox import GeckoDriverManager

driver = webdriver.Firefox(
    service=Service(GeckoDriverManager().install())
)

driver.get("https://example.com")

print(driver.title)

driver.quit()

Output

Example Domain

Using WebDriver Manager with Microsoft Edge

from selenium import webdriver
from selenium.webdriver.edge.service import Service
from webdriver_manager.microsoft import EdgeChromiumDriverManager

driver = webdriver.Edge(
    service=Service(EdgeChromiumDriverManager().install())
)

driver.get("https://example.com")

print(driver.title)

driver.quit()

Output

Example Domain

Advantages of WebDriver Manager

WebDriver Manager provides several benefits.

Automatically downloads browser drivers
Eliminates manual driver management
No need to configure PATH variables
Supports multiple browsers
Automatically detects compatible driver versions
Simplifies Selenium project setup
Reduces browser compatibility issues

Limitations of WebDriver Manager

Although WebDriver Manager is useful, it has some limitations.

It is a third-party library.
Internet access is required to download browser drivers.
Selenium Manager provides similar functionality without installing an additional package.
Modern Selenium projects generally prefer Selenium Manager.

WebDriver Manager vs Selenium Manager

WebDriver Manager	Selenium Manager
Third-party library	Built into Selenium
Requires separate installation	No separate installation
Available before Selenium 4.6	Introduced in Selenium 4.6
Downloads browser drivers automatically	Downloads browser drivers automatically
Widely used in older frameworks	Recommended for modern Selenium projects

When Should You Use WebDriver Manager?

WebDriver Manager is useful when:

Working on existing Selenium projects that already use it.
Maintaining older automation frameworks.
Your organization has standardized on WebDriver Manager.
Selenium Manager is not available due to an older Selenium version.

For new Selenium projects, Selenium Manager is generally the preferred choice.

Common Issues

ModuleNotFoundError

Error

ModuleNotFoundError: No module named 'webdriver_manager'

Solution

Install the library:

pip install webdriver-manager

Driver Download Fails

Cause

No internet connection or restricted network access.

Solution

Ensure internet connectivity or configure browser drivers manually.

Browser Version Not Supported

Cause

The installed browser is outdated or incompatible.

Solution

Update the browser to the latest stable version.

Best Practices

Use the latest version of WebDriver Manager when maintaining existing projects.
Prefer Selenium Manager for new Selenium automation frameworks.
Keep browsers updated to ensure compatibility.
Install only the browser drivers required for your project.
Use virtual environments to manage project dependencies.

Frequently Asked Questions (FAQs)

What is WebDriver Manager?

WebDriver Manager is a Python library that automatically downloads and manages browser drivers for Selenium.

Do I need WebDriver Manager with Selenium 4.6 or later?

Not necessarily. Selenium 4.6 introduced Selenium Manager, which provides built-in browser driver management. However, many existing projects still use WebDriver Manager.

Which browsers are supported by WebDriver Manager?

It supports Google Chrome, Mozilla Firefox, Microsoft Edge, Opera, and several other browsers.

Is WebDriver Manager free?

Yes. WebDriver Manager is an open-source library.

Which is better: Selenium Manager or WebDriver Manager?

For new Selenium projects, Selenium Manager is generally recommended because it is built into Selenium and requires no additional installation. However, understanding WebDriver Manager remains valuable because many existing automation frameworks still rely on it.

Key Takeaways

WebDriver Manager is a third-party library that automatically downloads and manages browser drivers.
It eliminates the need to manually download and configure browser drivers.
It supports major browsers such as Chrome, Firefox, and Edge.
Many existing Selenium automation frameworks still use WebDriver Manager.
Selenium Manager has largely replaced WebDriver Manager for new Selenium projects.
Understanding both Selenium Manager and WebDriver Manager is important for real-world automation projects and Selenium interviews.