The best alternatives to Biscuit are Tor Messenger, Blisk browser, and Blockstack. If these 3 options don't work for you, we've listed a few more alternatives below.
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Haggle — A CTA buyers want to click, when they aren't ready to demo
Download Blisk - a browser for web developers. Blisk - is a developer-oriented browser with devices, URL and scroll sync, auto-refresh, screenshots and screen recorder.