Security News > 2021 > August > Firefox 91 delivers new security and privacy options

Released on August 10, Firefox 91 delivers HTTPS by Default in Private Browsing mode and an enhanced cookie clearing option.

"While there remain many websites that don't use HTTPS by default, a large fraction of those sites do support the optional use of HTTPS. In such cases, Firefox Private Browsing Windows now automatically opt into HTTPS for the best available security and privacy," Mozilla explained.

"In the cases where the website does not support HTTPS, Firefox will automatically fall back and establish a connection using the legacy HTTP protocol instead.".

You can set Firefox to use Private Browsing by default in Firefox's Preferences.

Until now, Firefox stored cookies and data set by websites into separate "Cookie jars", but "Emptying" those would result in the clearing of only those set by the websites, and not the ones stored by sites embedded on it.

"Once enabled, Enhanced Cookie Clearing will be used whenever you clear data for specific websites. For example, when using 'Clear cookies and site data' in the identity panel or in the Firefox preferences," Mozilla explained.

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