[tbb-dev] Fwd: Intent to implement and ship navigator.webdriver

[Tom Ritter]

Doesn't look like an issue, it will just expose a new flag which would
provide version detection.


---------- Forwarded message ----------
From: Andreas Tolfsen <ato at sny.no>
Date: Mon, Feb 5, 2018 at 10:37 AM
Subject: Intent to implement and ship navigator.webdriver
To: dev-platform <dev-platform at lists.mozilla.org>
Cc: tools-marionette at lists.mozilla.org


Summary:
I intend to implement and ship a new enumerable, non-configurable,
read-only "webdriver" attribute on the Navigator object.  The
attribute is true when the -marionette flag is passed to Firefox
or the marionette.enabled preference is true.  Otherwise it is
false.

Motivation:
To give web authors a way to infer if user agent is controlled by
automation, so the document can take alternate code paths when under
test.

Bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1169290

Standard:
https://w3c.github.io/webdriver/webdriver-spec.html#interface

Estimated target release:
60

Testing:
Covered by WPT.

Do other engines have this?
Blink [1], Edge, and WebKit [2] have this.  Blink only exposes the
attribute during automation, but we expect them to unconditionally
expose it given a recent specification change [3].

  [1] https://groups.google.com/a/chromium.org/d/msg/blink-dev/6GysDZCWwB8/rXbGoRohBgAJ
  [2] https://git.webkit.org/?p=WebKit.git;a=commit;h=ce5ef8d5e72fb49cf2a0b72e2a5a8fb551c57f5a
  [3] https://github.com/w3c/webdriver/commit/a224627dcea6448367523bf0420de3d547946300

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