Open-Source Testing · seleniumbase

SeleniumBase

SeleniumBase is a Python framework for browser automation, web testing, and scraping that includes anti-bot-detection capabilities through CDP Mode and stealthy Playwright integration. It wraps Selenium and adds a higher-level API with test reporting, recording, and multi-browser support.

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Source: GitHub — github.com/seleniumbase/SeleniumBase

12.8k

GitHub stars

1.6k

Forks

Python

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	seleniumbase/SeleniumBase
Owner	seleniumbase
Primary language	Python
License	MIT — OSI-approved
Stars	12.8k
Forks	1.6k
Open issues	14
Latest release	v4.50.6 (2026-07-08)
Last updated	2026-07-08
Source	https://github.com/seleniumbase/SeleniumBase

What SeleniumBase is

Built on Selenium WebDriver and Chromium/Playwright, SeleniumBase provides a pytest-integrated test framework with CDP Mode for headless stealth automation, anti-detection via browser fingerprint masking, and a dashboard for test reporting. Supports both traditional Selenium and stealthy CDP/Playwright modes.

Quickstart

Get the SeleniumBase source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/seleniumbase/SeleniumBase.git2cd SeleniumBase3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

E2E Testing with Bot-Detection Bypass

Automated testing of web applications protected by bot-detection systems (Cloudflare, reCAPTCHA, etc.). CDP Mode masks browser identifiers to appear as normal user traffic.

Web Scraping and Data Collection

Large-scale scraping projects where target sites block automated access. Stealthy modes and anti-detection features allow data extraction while evading detection.

Regression Testing and CI/CD Integration

Pytest-native test framework with built-in reporting, screenshots, video recording, and CI/CD workflow examples. Suitable for QA pipelines requiring visual regression and cross-browser validation.

Implementation considerations

CDP Mode requires Chromium-based browser (Chrome/Edge/Brave); Firefox and Safari are not supported for stealth features.
Anti-detection masks are browser-level (user-agent, navigator properties, WebGL); site-specific detection (behavioral, IP-based) may still trigger and require additional circumvention.
Playwright integration via CDP is optional; core framework works with Selenium WebDriver alone. Mixing both adds complexity.
Test reports and dashboards require local storage; production dashboards need external hosting or artifact repository integration.
Installation includes Chromium download; for air-gapped environments, pre-cache or use system Chromium via environment variables.

When to avoid it — and what to weigh

Unauthorized Access Is Illegal — Do not use SeleniumBase's anti-detection features to bypass protections on sites you do not own or have permission to access. Circumventing authentication or scraping protected content may violate laws (CFAA, GDPR, ToS).
Simple Lightweight Automation — If you need minimal dependencies and a thin wrapper over Selenium, SeleniumBase's full framework overhead (pytest, reporting, CDP mode) may be unnecessary. Raw Selenium or Playwright may suffice.
High-Volume Headless Performance — CDP Mode is CPU/memory intensive for large concurrent sessions. If you need thousands of parallel headless browsers, dedicated proxy farms or lightweight HTTP clients are more efficient.
Closed-Source Commercial Requirements — MIT license allows commercial use, but requires attribution and acceptance of no warranty clause. If your compliance policy forbids permissive licenses, requires commercial support SLAs, or restricts MIT licensing, review with legal.

License & commercial use

MIT License. Permissive open-source; allows commercial use, modification, and distribution with attribution and liability disclaimer.

MIT license permits commercial use without explicit commercial license purchase. However, no warranty clause applies; your organization assumes all liability. Verify internal compliance policy accepts MIT before deployment. No commercial support tier, SLA, or vendor indemnification is stated in the data provided.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

Anti-detection does not equate to security. Masking browser fingerprints and user-agent headers helps evade bot-detection, but does not provide encryption, authentication, or data-at-rest protection. HTTPS still required for sensitive operations. User responsible for ethical use; unauthorized scraping or access circumvention violates laws and terms of service. No built-in secrets management; credentials hardcoded in scripts are exposed in logs.

Alternatives to consider

Playwright

Modern browser automation with native async/await, multi-language support, and built-in device emulation. No native anti-detection; requires third-party stealth plugins. Lighter footprint for CI/CD.

Cypress

JavaScript-native E2E testing with excellent DX and real-time browser preview. Does not support anti-detection or headless scraping; better for developer-facing testing rather than bot-resistant automation.

Raw Selenium WebDriver

Lower-level control with minimal abstraction. No built-in reporting, test framework, or anti-detection. Requires manual orchestration but offers maximum flexibility and minimal dependencies.

Software development agency

Build on SeleniumBase with DEV.co software developers

SeleniumBase is ideal for teams needing bot-resistant web automation and comprehensive test reporting. Understand the legal and technical trade-offs before deployment. Our team can help architect scalable automation pipelines.

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SeleniumBase FAQ

Does SeleniumBase work with Firefox or Safari?

Core Selenium WebDriver features support Firefox and Safari. Stealthy CDP Mode and anti-detection features are Chromium-only (Chrome, Edge, Brave).

Can I use SeleniumBase to bypass Cloudflare, reCAPTCHA, or similar protections?

CDP Mode masks browser identifiers to reduce bot-detection. However, effectiveness depends on the target's detection logic; behavioral, IP, or CAPTCHA-solving may still block. No guarantee. Always verify you have legal permission to access the target site.

Is SeleniumBase free for commercial projects?

Yes, MIT license permits commercial use without license fees. However, there is no warranty or commercial support. Your organization assumes all risk and liability.

How do I run tests in CI/CD?

GitHub Actions workflow examples are provided in ./integrations/github/workflows/. SeleniumBase integrates with pytest; any CI runner supporting Python and pytest (Jenkins, GitLab CI, etc.) will work. Dashboard artifacts require external storage or repository uploads.

Custom software development services

DEV.co is a software development agency delivering custom software development services to companies building on open source. Our software developers and web developers design, integrate, and ship production systems — spanning web development, APIs, AI, data, and cloud. If SeleniumBase is part of your open-source testing roadmap, our team can implement, customize, migrate, and maintain it.

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