If you are using Firefox on your computer, you should update now. Mozilla has released security updates for Firefox 67.0.3 and Firefox ESR 60.7.1, to fix.
The US Cybersecurity and Infrastructure Security Agency also issued an alert for users and system administrators to review Mozilla’s security advisory and act accordingly. In other words, you need to update your browser.
Google Project Zero and Coinbase Security reported the bug.
You can install the update using the following links: