New link opening method makes hackerone vulnerable to tabnabbing

**Summary:** Hackerone recently changed how it opens the external links and this new way is vulnerable to tabnabbing. **Description:** Please see the POC. ### Steps To Reproduce 1. Click here: https://awasthi7.github.io/ 2. Click on proceed when warning appears. 3. The site will open in new tab and hackerone tab will be replaced by Google. ### Optional: Your Environment (Browser version, Device, etc) * ### Optional: Supporting Material/References (Screenshots) * ## Impact Unvalidated redirect