Vulnerabilities

When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed.

In unusual circumstances, an individual thread may outlive the thread's manager during shutdown.

If an attacker could control the contents of an iframe sandboxed with <code>allow-popups</code> but not <code>allow-scripts</code>, they were able to craft a link that, when clicked, would lead to JavaScript execution in…

When resizing a popup after requesting fullscreen access, the popup would not display the fullscreen notification.

While the text displayed in Autofill tooltips cannot be directly read by JavaScript, the text was rendered using page fonts.

An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash.

Mozilla developers Kershaw Chang, Ryan VanderMeulen, and Randell Jesup reported memory safety bugs present in Firefox 97.