Vulnerabilities

A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered.

The Mozilla Maintenance Service can be invoked by an unprivileged user to read 32 bytes of any arbitrary file on the local system by convincing the service that it is reading a status file provided by the Mozilla Windows…

The Mozilla Maintenance Service can be invoked by an unprivileged user to overwrite arbitrary files with junk data using the Mozilla Windows Updater, which runs with the Maintenance Service's privileged access.

An attack using manipulation of "updater.ini" contents, used by the Mozilla Windows Updater, and privilege escalation through the Mozilla Maintenance Service to allow for arbitrary file execution and deletion by the Main…

The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet.

Default fonts on OS X display some Tibetan characters as whitespace.

When entered directly, Reader Mode did not strip the username and password section of URLs displayed in the addressbar.

The Mozilla Maintenance Service "helper.exe" application creates a temporary directory writable by non-privileged users.

The Mozilla Windows updater modifies some files to be updated by reading the original file and applying changes to it.

Android intent URLs given to Firefox for Android can be used to navigate from HTTP or HTTPS URLs to local "file:" URLs, allowing for the reading of local data through a violation of same-origin policy.

The Firefox installer on Windows can be made to load malicious DLL files stored in the same directory as the installer when it is run.

Memory safety bugs were reported in Firefox 53.