www.ulta.com checkout doesn't work due to fingerprinting.

[ryanbr]

Description

Unable to go through checkout on https://www.ulta.com

Steps to Reproduce

1. Open https://www.ulta.com/featured/50off_jaclyn_cosmetics_highlighters?N=7vzezd&Ns=product.bestseller%7C1
2. Add an item to Bag
3. Click on top right to view cart
4. Click on Secure Checkout

Actual result:

Doesn't forward to checkout, when clicking on the red Secure Checkout button.

Expected result:

Let user go through checkout process

Reproduces how often:

With default shields,

Brave version (brave://version info)

[Version 1.45.35 Chromium: 105.0.5195.102 (Official Build) nightly (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 nightly channel? Tes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? Yes (Fingerprinting specifically)
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of (Safari)? No.

Miscellaneous Information:

Disabling Fingerprinting fixes this. Also Safari works without issue.

[pes10k]

The issue is with Ulta not accepting Brave's randomized weight on accept-language (disabing language based fingerprinting protections fixes the issue), despite Brave's randomized weight being valid by the spec

Short term, @ryanbr will reach out to Ulta and see if (fingers crossed) they'll fix their busted stuff. If not, @pilgrim-brave will add an exception to not apply randomization for ulta.

Medium term, we might create a new component to allow us to ship exceptions to users faster

[LaurenWags]

@pilgrim-brave @pes10k can this please be marked QA/Yes or QA/No as appropriate? If QA/Yes, let's make sure there's a test plan as well if the STR aren't sufficient. Thanks!

cc @rebron @kjozwiak

[pes10k]

Yep, sorry for missing that @LaurenWags . Marking QA/Yes, and the STR are perfect

[stephendonner]

Verified PASSED using

Brave	1.46.76 Chromium: 107.0.5304.62 (Official Build) beta (x86_64)
Revision	1eec40d3a5764881c92085aaee66d25075c159aa-refs/branch-heads/5304@{#942}
OS	macOS Version 11.7 (Build 20G817)

Steps:

1. installed 1.46.76
2. launched Brave
3. loaded ulta.com
4. searched for jacelyn cosmetics highlighters (https://www.ulta.com/ulta/a/_/Ntt-jaceyln%20cosmetics%20highlighters/Nty-1?Dy=1&ciSelector=searchResults)
5. clicked on https://www.ulta.com/p/accent-light-highlighter-pimprod2022958 and added to to my cart/bag
6. clicked on Secure checkout

Confirmed I was taken to the secure-checkout page, to fill out payment & shipping details, successfully (did not complete purchase, of course).

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