fix(ui): reconcile modifier state for Firefox resistFingerprinting (#1305)#1344
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adamshiervani wants to merge 2 commits intodevfrom
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fix(ui): reconcile modifier state for Firefox resistFingerprinting (#1305)#1344adamshiervani wants to merge 2 commits intodevfrom
adamshiervani wants to merge 2 commits intodevfrom
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…sistFingerprinting spoofing (#1305) Firefox's resistFingerprinting (RFP) spoofs navigator.platform to "Win32" on all OSes, causing isWindows() to return true on Linux. This activates the Windows-specific AltGr key buffering logic, which combined with RFP's ~100ms timestamp precision reduction makes the 3ms AltGr timing check unreliable, potentially swallowing or misrouting key events during password entry. Fix: 1. Use navigator.userAgentData?.platform (User-Agent Client Hints API) when available (Chromium browsers). This API is not affected by RFP. 2. For Firefox/Safari (no userAgentData), detect RFP by checking if both Date.now() and performance.timeOrigin are clamped to 100ms boundaries. When RFP is detected, don't trust the spoofed platform value and return false, disabling the unreliable AltGr workaround.
…tFingerprinting (#1305)
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Summary
resistFingerprintingsuppresses standalone modifier key events (Shift, Ctrl, Alt, Meta keydown/keyup never fire), causing uppercase letters and modified keys to be sent as unmodifiede.shiftKey/e.ctrlKey/e.altKey/e.metaKeyboolean properties after each keydown/keyup and synthesizes missing modifier press/release eventsisWindows()detection to avoid RFP spoofingnavigator.platformto "Win32", which incorrectly activated AltGr buffering on non-Windows systemsCloses #1305