1684455 - The "Fingerprinters Protection" CFR is not triggered when navigating to https://edition.cnn.com/

Status: VERIFIED FIXED

(Firefox :: Messaging System, defect, P1)

Description

[Patriciu Pop [:ppop], Ecosystem QA]

Attachment: fingerprinting_cfr.gif

[Affected versions]:

• Firefox Nightly 86.0a1, Build ID 20201228205313

[Affected platforms]:

• Windows 10 x64
• macOS 10.15
• Ubuntu 20 x64

[Prerequisites]:

• Have a clean new profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites and navigate to the "https://edition.cnn.com/" page.
2. Open 2 new tabs and navigate to CNN in both of them.
3. Navigate to CNN in a new tab and observe the behavior.

[Expected result]:

• The "Fingerprinters Protection" CFR doorhanger is displayed.

[Actual result]:

• The doorhanger is not displayed.

[Regression]:

• I have managed to find a regression window, using the Mozregression tool. Here are the results:
  12:55.39 INFO: Last good revision: aa95b6225a7416d52310f0a90152a91788527d33
  12:55.39 INFO: First bad revision: 60e886fcc3db9f0ed4e173732653ef00ccead3c3
  12:55.39 INFO: Pushlog:
  https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=aa95b6225a7416d52310f0a90152a91788527d33&tochange=60e886fcc3db9f0ed4e173732653ef00ccead3c3
• From the pushlog, it seems that bug 1682821 might have caused this issue.

[Notes]:

• Attached a screen recording of the issue:

@andreio Could you please take a look at this?

Comment 1

[Andrei Oprea [:andreio]]

Attachment: Bug 1684455 - The fingerprint protection CFR is not triggered

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4d40cf33562f
The fingerprint protection CFR is not triggered r=nanj

Comment 3

[Andreea Pavel [:apavel]]

https://hg.mozilla.org/mozilla-central/rev/4d40cf33562f

Comment 4

[Patriciu Pop [:ppop], Ecosystem QA]

I have verified that the issue is no longer reproducible, the "Fingerprinters Protection" CFR is successfully triggered when navigating to https://edition.cnn.com/. Tested using Firefox Nightly 86.0a1, Build ID 20210107040715 on Windows 10 x64, macOS 10.15, and Ubuntu 20 x64.