Notifications not working on Wordpress.com sites

[ryanbr]

Description

Visiting https://cookandcount.wordpress.com/ (while logged into wordpress.com) stops notifications from showing up.

Steps to Reproduce

1. Login to wordpress.com first
2. Then visit https://cookandcount.wordpress.com/
3. With shields up, click on the Wordpress Bell on the top right.

Actual result:

Expected result:

With Allow all cookies / Shields Down.

Reproduces how often:

Easily

Brave version (brave://version info)

Version 1.5.123 Chromium: 80.0.3987.163 (Official Build) (64-bit)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel?
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? Yes
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

Tested in the referrer list: (without any luck)
"​​https://*.wordpress.com/*",
"https://*.wp.com/*",

Cookies being blocked:

Allow all cookies is needed

[ryanbr]

@pes The cookies being affected:

*.public-api.wordpress.com/wp_api
*.public-api.wordpress.com/wp_api_sec

Whitelisting these cookies seems to fix the wordpress notifications issues.

[pes10k]

From slack convo:

@pes: The problem here is third party cookies. This seems crazy, but the reason why is that the side widget is an iframe pointing to widgets.wp.com, and that iframe tries to set up a websocket back to wordpress.com. Since that request to wordpress is 3p (relative to wp.com) the websocket setup request doesn’t carry cookies, and it falls over

[rebron]

verified works on version below following STR:

Brave	1.10.73 Chromium: 81.0.4044.138 (Official Build) beta (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS	macOS Version 10.15.5 (Build 19F83c)

[rebron]

Verified works on Nightly version below following STR:

Brave	1.11.31 Chromium: 83.0.4103.61 (Official Build) nightly (64-bit)
Revision	94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS	macOS Version 10.15.5 (Build 19F83c)

[GeetaSarvadnya]

Verification passed on

Brave | 1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
-- | --
Revision | 8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS | Windows 10 OS Version 1803 (Build 17134.1006)

• Verified STR from the description
• Verified with default shield settings Wordpress Bell notifications are shown

---

Verified passed with

Brave | 1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
-- | --
Revision | 8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS | macOS Version 10.14.6 (Build 18G3020)

• Reproduced the issue using 1.9.72 and STR from description:

• Verified on upgrade profile that issue no longer reproduces:

• Verified STR from description on a clean profile with 1.9.76:

---

Brave	1.9.76 Chromium: 81.0.4044.138 (Official Build) (64-bit)
Revision	8c6c7ba89cc9453625af54f11fd83179e23450fa-refs/branch-heads/4044@{#999}
OS	Linux

• Verified STR from description on a clean and upgraded profile with 1.9.76