Environment: Operating system: Windows 10 Pro Firefox version: Firefox Nightly 66.0a1 (2018-12-17) (64-bit) Prerequisites: Enable Basic Tracking Protection Steps to reproduce: 1. Navigate to: https://plug.dj/ 2. Click the "SIGN UP NOW" button. 2. Observe the page. Expected Behavior: The "Sign Up Now!" pop-up box must be displayed. Actual Behavior: The pop-up box is missing. Notes: 1. Screenshot link: http://prntscr.com/lwhhgp 2. The issue is reproducible for all the available buttons from the page(LOGIN, FIND A COMMUNITY)

This is related to `login` breakage #1470298 Looking at the devtools console, here are the blocked resources: The resource at “https://www.google-analytics.com/analytics.js” was blocked because content blocking is enabled.[Learn More] plug.dj The resource at “https://static.hotjar.com/c/hotjar-553331.js?sv=5” was blocked because content blocking is enabled.[Learn More] plug.dj The resource at “https://connect.facebook.net/en_US/sdk.js” was blocked because content blocking is enabled.[Learn More] plug.dj So these are the domains to test: www.google-analytics.com static.hotjar.com connect.facebook.net I opened the URL in a fresh browser profile (Firefox Nightly 66, uMatrix installed, normal mode) and loaded the page. The pop-up box was not displayed. I disabled the Spoof Referrer option in uMatrix and then *WHITELISTED*: facebook.com facebook.net google.com gstatic.com After this, the pop-up box was displayed. The other resources didn't help. Umatrix screenshot link: http://prntscr.com/lwhbyj google.com / gstatic.com can be found in disconnect-blacklist.json list. facebook.com / facebook.net can be found in disconnect-mapping.json list.