When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90.
{ "binaries": [ { "binary_name": "firefox", "binary_version": "90.0+build1-0ubuntu0.18.04.1" }, { "binary_name": "firefox-dev", "binary_version": "90.0+build1-0ubuntu0.18.04.1" }, { "binary_name": "firefox-geckodriver", "binary_version": "90.0+build1-0ubuntu0.18.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "90.0+build1-0ubuntu0.18.04.1" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_name": "firefox", "binary_version": "90.0+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-dev", "binary_version": "90.0+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-geckodriver", "binary_version": "90.0+build1-0ubuntu0.20.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "90.0+build1-0ubuntu0.20.04.1" } ], "availability": "No subscription required" }