Case Study: Mozilla achieves up to 80% faster, more reliable, and scalable testing with Sauce Labs

Mozilla, creator of Firefox and Firefox OS, runs tests quickly and reliably with Open Sauce

Mozilla, the open‑source organization behind Firefox and Firefox OS, needed a faster, more reliable way to find failures and scale testing. Their in‑house Selenium grid was costly to expand, prone to VM and browser crashes, and required time‑consuming remote maintenance across a distributed team, while horizontal scaling was slow and made test results unreliable.

By adopting Sauce Labs’ Open Sauce cloud, Mozilla gained unlimited test capacity, rich reporting (videos, screenshots, HTML reports) and pytest hooks that they embedded in their infrastructure and shared with the community. The QA team now runs thousands of tests daily across 18 projects and 80 suites, sees up to 80% faster execution (examples: 8 minutes → 2 minutes), simpler cross‑browser/mobile coverage, and far more reliable, hassle‑free test runs.

Mozilla

Stephen Donner

Web QA Manager