Mozilla have promised a fix to prevent potentially sensitive private data being captured by the new tab thumbnail feature in its new Firefox 13 broswer.
Privacy-conscious users have complained that some of the screenshots used to record the thumbnails are from content grabbed from users’ supposedly secure HTTPS browsing sessions.
One user said that when he opened a new tab on Firefox 13 he was “greeted by my earlier online banking and webmail sessions complete with account numbers, balances, subject lines etc. This content is behind a secure login for a reason.”
Mozilla acknowledged that the feature was undesirable and promised a patch to fix the problem would be released in a future version of Firefox.
It said in a statement: “The new tab thumbnail feature within Firefox does not transmit nor store personal information outside the user’s direct control.
“The new tab thumbnails are based on users’ browsing history. All information is contained within the browser and can be deleted at any time. Users can also switch back to using blank new tab screens by clicking the square icon in the top right corner of the browser. That will change the default preference to show a blank page, rather than the most visited websites when a new tab is opened.
“Users who share their computer or use Firefox on a public computer should follow best practices for protecting their privacy by utilizing the built-in privacy tools in in Firefox, such as Private Browsing Mode.”