In Firefox before 69.0, navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks.
In Firefox before 69.0, navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks.
https://www.mozilla.org/en-US/security/advisories/mfsa2019-25/#CVE-2019-11743 https://bugzilla.mozilla.org/show_bug.cgi?id=1560495
Vulmon