1269932 - Netflix Widevine video playback fails when spoofing Chrome UA: TypeError: window.cancelIdleCallback is not a function

Status: RESOLVED WORKSFORME

(Core :: Audio/Video: Playback, defect, P3)

Description

[Chris Peterson [:cpeterson]]

Netflix sometimes fails to play Widevine video when spoofing a Chrome UA because it calls window.cancelIdleCallback, a Chrome-only DOM API:

TypeError: window.cancelIdleCallback is not a function

This happens in my default profile, but not a clean-ish test profile. The problem temporarily went away when I signed out of Netflix and force-reloaded the player page.

Netflix should probably feature detection window.cancelIdleCallback instead of using UA detection. But for now, this is not really a Firefox or Netflix "bug" because we are lying about our UA.

requestIdleCallback and cancelIdleCallback are being implemented in bug 1198381.

Comment 2

[Chris Peterson [:cpeterson]]

TypeError: window.cancelIdleCallback is not a function

X<.onScrollEnd() bk:620
bound () self-hosted
h._onScroll/this.scrollTimeout<() bk:140

Comment 3

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

Mass change P2 -> P3

Comment 4

[:glob ✱]

with bug 1198381 fixed is this bug still required to be tracked?

Comment 5

[Andrew Overholt [:overholt]]

Chris, can you re-try given comment 4? Thanks!

Comment 6

[Chris Peterson [:cpeterson]]

WORKSFORME with Nightly 53 build 2016-11-21 when spoofing a Chrome UA.