Ubuntu Security Notice USN-779-1 – Several flaws were discovered in the browser and JavaScript engines of Firefox. Pavel Cvrcek discovered that Firefox would sometimes display certain invalid Unicode characters as whitespace. Gregory Fleischer, Adam Barth and Collin Jackson discovered that Firefox would allow access to local files from resources loaded via the file: protocol. Shuo Chen, Ziqing Mao, Yi-Min Wang, and Ming Zhang discovered that Firefox did not properly handle error responses when connecting to a proxy server. Wladimir Palant discovered Firefox did not check content-loading policies when loading external script files into XUL documents. It was discovered that Firefox could be made to run scripts with elevated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/78387/USN-779-1.txt
Source: https://packetstormsecurity.com/files/78387/Ubuntu-Security-Notice-779-1.html