Installing a pre-release version of your web browser promises at least two distinct thrills. The first one: You get to test new features sometimes months before mainstream users see them. How cool is that?

The second thrill comes from taking a risk. Installing pre-release software can cause data loss (perhaps even hair loss), excess battery drain on portables and other aggravations. As Google puts it on its Chrome Canary download page, it’s “not for the faint of heart.”

But let’s assume you’re up for the challenge and eager to see what’s next for your browser. Here’s what you need to know about pre-release versions of Chrome, Safari Technical Preview, Firefox and Edge.

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