Security News > 2021 > August > Firefox 91 Brings New Privacy, Security Improvements
Mozilla on Tuesday released Firefox 91, a version of the web browser that brings enhanced cookie clearing, HTTPS by default in private browsing mode, and patches for several high-severity vulnerabilities.
Once the user updates Firefox to version 91, the browser will automatically use an HTTPS connection when the Private Browsing feature is used.
If the website does not support HTTPS, Firefox will establish a connection using the HTTP protocol.
The organization also announced on Tuesday that Firefox 91 brings a significant privacy enhancement related to how cookies are handled, enabling users to easily delete all cookies and supercookies stored locally by websites and trackers.
"When you decide to tell Firefox to forget about a website, Firefox will automatically throw away all cookies, supercookies and other data stored in that website's 'cookie jar'," Mozilla explained.
The organization also published a security advisory to inform users about the vulnerabilities that have been patched with the release of Firefox 91.