Starbucks gift card balance rendering issue

[spinelmoon]

When I check a Starbucks gift card balance, the box that is supposed to display the balance...simply doesn't. It's completely wrong.

How it appears in PM 27.5.1 (32-bit) (under fresh profile, no add-ons)

starbucks palemoon error.png

How it is intended to appear (Chrome)

starbucks intended display.png

Troubleshooting information:

Application Basics
------------------

Name: Pale Moon
Version: 27.5.1
Build ID: 20171007103905
Update Channel: default
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.9) Gecko/20100101 Goanna/3.3 Firefox/52.9 PaleMoon/27.5.1
OS: Windows_NT 6.1
Multiprocess Windows: 0/1 (default: false)
Safe Mode: false

Extensions
----------

Name: [TEST] Clippings
Version: 5.0.1
Enabled: true
ID: {91aa5abe-9de4-4347-b7b5-322c38dd9271}

Name: Adblock Latitude
Version: 4.0.1
Enabled: true
ID: adblocklatitude@addons.palemoon.org

Name: Cookie Controller
Version: 6.1
Enabled: true
ID: {ac2cfa60-bc96-11e0-962b-0800200c9a66}

Name: Download Manager (S3)
Version: 4.13
Enabled: true
ID: s3download@statusbar

Name: Element Hiding Helper for Adblock Plus
Version: 1.3.1-signed
Enabled: true
ID: elemhidehelper@adblockplus.org

Name: Expose Noisy Tabs
Version: 0.8.0
Enabled: true
ID: expose-noisy-tabs@wsdfhjxc

Name: Forecastfox (fix version)
Version: 2.4.6
Enabled: true
ID: forecastfox@s3_fix_version

Name: Greasemonkey
Version: 3.12.1beta1
Enabled: true
ID: {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

Name: I don't care about cookies
Version: 2.7.2
Enabled: true
ID: jid1-KKzOGWgsW3Ao4Q@jetpack

Name: Menu Wizard
Version: 5.10
Enabled: true
ID: s3menu@wizard

Name: Moon Tester Tool
Version: 1.1.4
Enabled: true
ID: moonttool@Off.JustOff

Name: NoScript
Version: 5.0.6
Enabled: true
ID: {73a6fe31-595d-460b-a920-fcc0f8843232}

Name: Tab Mix Plus
Version: 0.5.0.4
Enabled: true
ID: {dc572301-7619-498c-a57d-39143191b318}

Name: ThemeTool
Version: 5.0.3
Enabled: true
ID: {0daf556d-70de-4b15-a90f-b30395bd9c22}

Graphics
--------

Adapter Description: NVIDIA GeForce GTX 645
Adapter Description (GPU #2): Intel(R) HD Graphics 4600
Adapter Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter Drivers (GPU #2): igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter RAM: 1024
Adapter RAM (GPU #2): Unknown
Device ID: 0x11c4
Device ID (GPU #2): 0x0412
Direct2D Enabled: true
DirectWrite Enabled: true (6.2.9200.22164)
Driver Date: 9-16-2017
Driver Date (GPU #2): 7-9-2013
Driver Version: 22.21.13.8569
Driver Version (GPU #2): 9.18.10.3234
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 102910de
Subsys ID (GPU #2): 0000000c
Vendor ID: 0x10de
Vendor ID (GPU #2): 0x8086
WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 645 Direct3D11 vs_5_0 ps_5_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d 1.1
AzureContentBackend: direct2d 1.1
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0

Important Modified Preferences
------------------------------

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.download.folderList: 2
browser.download.importedFromSqlite: true
browser.download.useDownloadDir: true
browser.places.smartBookmarksVersion: 4
browser.search.openintab: true
browser.search.suggest.enabled: false
browser.search.useDBForOrder: true
browser.sessionstore.max_tabs_undo: 0
browser.sessionstore.restore_on_demand: false
browser.sessionstore.resume_from_crash: false
browser.startup.homepage: http://www.google.com
browser.startup.homepage_override.buildID: 20171007103905
browser.startup.homepage_override.mstone: 3.3.0
browser.tabs.closeWindowWithLastTab: false
browser.tabs.loadInBackground: false
browser.tabs.selectOwnerOnClose: false
browser.tabs.warnOnClose: false
browser.tabs.warnOnCloseOtherTabs: false
browser.tabs.warnOnOpen: false
browser.urlbar.suggest.openpage: false
extensions.lastAppVersion: 27.5.1
font.internaluseonly.changed: false
font.name.serif.x-western: Verdana
general.autoScroll: false
gfx.direct3d.last_used_feature_level_idx: 0
image.http.accept: image/webp,image/jxr,image/png,image/*;q=0.8,*/*;q=0.5
network.cookie.cookieBehavior: 1
network.cookie.prefsMigrated: true
places.database.lastMaintenance: 1508097451
places.history.expiration.transient_current_max_pages: 104858
plugin.importedState: true
plugin.state.flash: 2
plugin.state.java: 2
plugin.state.np32dsw: 2
plugin.state.npctrl: 2
plugin.state.npdeployjava: 1
plugin.state.npgoogleupdate: 2
plugin.state.npintelwebapiipt: 2
plugin.state.npintelwebapiupdater: 2
plugin.state.nppdf: 2
plugin.state.npqtplugin: 2
plugin.state.npunity3d: 2
plugin.state.npwacomtabletplugin: 2
plugin.state.npwlpg: 2
privacy.donottrackheader.enabled: true
privacy.donottrackheader.value: 1
privacy.sanitize.migrateFx3Prefs: true
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1506724805

Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 1

Library Versions
----------------

NSPR
Expected minimum version: 4.16
Version in use: 4.16

NSS
Expected minimum version: 3.32.1
Version in use: 3.32.1

NSSSMIME
Expected minimum version: 3.32.1
Version in use: 3.32.1

NSSSSL
Expected minimum version: 3.32.1
Version in use: 3.32.1

NSSUTIL
Expected minimum version: 3.32.1
Version in use: 3.32.1

Experimental Features
---------------------

So, what terrible coding practice has Starbucks used this time? To me, it looks like it is attempting to display the mobile version of the site in that frame.

[Pallid Planetoid]

Did this rendering problem start with Pale Moon 27.5.1 (in other words did this page work before)?

[spinelmoon]

This is the first time I've tried to check a Starbucks gift card balance since switching to Pale Moon as my main browser. I downloaded PM 24.7.2 Portable to test, and it results in the same.