This browser was recently launched and is called Comet AI Browser. Currently, the official promotion allows users to get 1 month of Perplexity Pro for free through a referral link(No credit card required):

https://pplx.ai/hellohua34509

Steps to claim the free month:

Download Comet and log in to your account.

Use Comet and ask at least one question.

You’ll receive 1 month of Perplexity Pro for free.

This is the only way to get the free Pro plan. If you don’t use a referral link, you’ll need to pay $20/month to upgrade to Pro. The promotion is a limited-time offer, and the official site hasn’t announced when it will end — it might end at any time.