[Environment:] Browser / Version: Firefox Nightly 64.0a1 (2018-09-17) Operating System: Windows 10 Pro [Prerequisites:] 1. Tracking Protection Basic enabled. [Steps to Reproduce:] 1. Navigate to https://shop.sandisk.com/store?Action=pd&Locale=en_US&SiteID=sdiskus&productID=5217953000&varProductID=5217953500 2. Observe the page. [Expected Behavior::] Design is displayed correctly. [Actual Behavior::] Design is broken (no images/no css).

The issue is related to `trackingprotection` breakage. Looking at the devtools console, here are the blocked resources: The resource at “https://drh.img.digitalriver.com/DRHM/Storefront/Site/sdiskus/cm/multimedia/bootstrap/bootstrap.min.css” was blocked because content blocking is enabled. The resource at “https://drh2.img.digitalriver.com/DRHM/Storefront/Company/sandiskus/images/product/detail/Extreme_microSD_U3_A2_V30_400GB_HR.jpg” was blocked because content blocking is enabled. The resource at “https://drh1.img.digitalriver.com/DRHM/Storefront/Company/sandiskus/images/product/thumbnail/Extreme_microSD_U3_A2_V30_400GB_HR.jpg” was blocked because content blocking is enabled. The resource at “https://www.googletagmanager.com/gtm.js?id=GTM-579QB8” was blocked because content blocking is enabled. So below are the domains to test: - ​​drh.img.digitalriver.com - drh2.img.digitalriver.com - drh1.img.digitalriver.com - www.googletagmanager.com I opened the URL in a fresh browser profile (Firefox Nightly 64, uMatrix installed, normal mode) and loaded the page. The design is broken. I disabled the Spoof Referrer option in uMatrix and then WHITELISTED: - digitalriver.com (including all related domains) and the design was displayed correctly, but some icons were missing ("Cart", "Search", "Social Media" icons). I then WHITELISTED: - digitalrivercontent.net and the icons were displayed. The other resources didn't help. So in conclusion: - digitalriver.com is in Advertising category = [tp-ads] - digitalrivercontent.net is not listed

Added uMatrix results.