![]() ![]() Click History and select Clear Recent History….Click the menu button to open the menu panel.To learn more, see Clear cookies and site data in Firefox and How to clear the Firefox cache. Many problems with loading web pages can be resolved by clearing Firefox's cookies and cached Web content. Sometimes problems can be fixed by simply restarting your computer and then starting Firefox again. 8.2 Check for conflicts with your Internet security software.For desktop users, this means heading for the hamburger menu top right then Help|About Firefox. If you keep your browser running, without restarts or have disabled automatic updates for whatever reason, then you won't be protected until such a time as the patch is downloaded, installed and the browser restarted. Because Firefox will automatically update by default, and even do so in the background when you don't have the browser open, it should have been applied and fixed for most people by now. ![]() Rather it 'up plays' the fact that the Mozilla Foundation reacted super-quickly to the disclosure and has already released an emergency update for Firefox that patches the flaws. Which isn't in any way downplaying the seriousness of these critical vulnerabilities or the zero-day exploit Manfred Paul was able to demonstrate at PWN2OWN. In most cases, the answer will be nothing. What do Firefox browser users need to do now? A "prototype pollution in Top-Level Await implementation," could allow an attacker who corrupted an Array object in JavaScript to execute code in a privileged context.Īn "untrusted input used in JavaScript object indexing, leading to prototype pollution," which could allow an attacker to send "a message to the parent process where the contents were used to double-index into a JavaScript object." This, in turn, led to the prototype pollution as described in the first exploit example.
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