1767036 - [Bug]: Incognito mode detected through fingerprintjs.com

Status: RESOLVED INVALID

(GeckoView :: General, defect)

Description

[Delia Pop (Android QA)]

From github: https://github.com/mozilla-mobile/fenix/issues/24572.

Go to https://fingerprintjs.com/ in incognito

Expected behaviour

mitigate the possibility of being discovered.

Actual behaviour

Incognito tab mode detected

Device name

Mi 9T

Android version

Android 10

Firefox release type

Firefox Nightly

Firefox version

100

Device logs

+// if (is_incognito) {
+// return CalculateIncognitoDynamicSettings(
+// device_info_helper->AmountOfPhysicalMemory());
+// }

Additional information

No response

Change performed by the Move to Bugzilla add-on.

Comment 1

[Chris Peterson [:cpeterson]]

Firefox doesn't go out of its way to prevent sites from detecting Private Browsing mode. There are some APIs, such as IndexedDB, that behavior differently in Private Browsing mode (bug 1639542). Fixing those bugs is on another team's backlog.