1485639 - Facebook comments are not displayed on outthere.keenspot.com while Tracking Protection Basic was enabled

Status: RESOLVED FIXED

(Web Compatibility :: Site Reports, defect, P3)

Description

[Oana Arbuzov [:oanaarbuzov]]

Attachment: FBComments_notdisplayed.png

[Environment:]
Browser / Version: Firefox Nightly 63.0a1 (2018-08-22)
Operating System: Windows 10 Pro

[Prerequisites:]
    1. Tracking Protection Basic enabled.
[Steps to Reproduce:]
    1. Navigate to   http://outthere.keenspot.com/ 
    2. Scroll down the page to the “Section” drop-down menu. 
        
[Expected Behavior:]
Facebook comments are displayed.
 
[Actual Behavior:]
Facebook comments are not displayed.

Comment 1

[Oana Arbuzov [:oanaarbuzov]]

The issue is related to `trackingprotection` breakage.

Looking at the devtools console, here are the blocked resources:
The resource at “http://www.googletagservices.com/tag/js/gpt.js” was blocked because content blocking is enabled.
The resource at “http://connect.facebook.net/en_US/all.js#xfbml=1” was blocked because content blocking is enabled.
The resource at “http://www.google-analytics.com/ga.js” was blocked because content blocking is enabled.
The resource at “http://ib.adnxs.com/ut/v3/prebid” was blocked because content blocking is enabled.
The resource at “http://ap.lijit.com/rtb/bid?src=prebid_prebid_1.20.0” was blocked because content blocking is enabled.

So below are the domains to test:
- www.googletagservices.com
- connect.facebook.net
- www.google-analytics.com
- ib.adnxs.com
- ap.lijit.com

I opened the URL in a fresh browser profile (Firefox Nightly 63, uMatrix installed, normal mode) and loaded the page. The Facebook comments are not displayed.

I disabled the Spoof Referrer option in uMatrix and then WHITELISTED:
- facebook.com (including all related domains and frames)
- facebook.net (including all related domains)
and the comments were displayed.

The other resources didn't help. 

So in conclusion:
- facebook.com is in Disconnect categoty = [tp-social]

Comment 2

[Oana Arbuzov [:oanaarbuzov]]

Attachment: uMatrixResults.png

Added uMatrix results.

Comment 3

[Thomas Wisniewski [:twisniewski]]

The same technique I described in https://bugzilla.mozilla.org/show_bug.cgi?id=1492100#c5 works here as well, with the only difference being that the sdk.js is for en_US instead of zh_TW. I also noticed that we need to yellowlist https://www.facebook.com/plugins/comments/async/ for the "load more comments" button to work, which I had not tested in the other bug.

Comment 4

[Oana Arbuzov [:oanaarbuzov]]

The issue no longer occurs, Facebook comments are displayed now with ETP - Standard.
https://prnt.sc/wndzir

Note: The issue still occurs with ETP - Strict enabled.
https://prnt.sc/wnhb9q

Tested with:
Browser / Version: Firefox Nightly 86.0a1 (2021-01-13)
Operating System: Windows 10 Pro