List of free browser-test stuff for developerππ½
If you're looking for all programming tools around browser-test (not just free). Check this page List of browser-test Programming Tools
Microsoft Clarity
Clarity is a free user behavior analytics tool that helps you understand how users are interacting with your website through session replays and heatmaps.
Tag: UX, ux-testing, browser-test

Firelab
Detect bugs before your customers with automated browser testing - Firelab
Tag: testing, browser-test
100 tests

BrowserStack
Instant access to 2000+ browsers and real iOS and Android devices for cross browser testing. Ship apps and websites that work for everyone, every time. Get Free Trial.
Tag: browser-test, testing
Free for open source project detail here