Steps to reproduce: 1) Enable tracking protection in Firefox Nightly (privacy.trackingprotection.enabled). 2) Open an Air Mozilla page with an embedded vid.ly video, for example https://air.mozilla.org/tracking-protection-for-firefox/ Expected results: Video is embedded in the page. Actual results: No video appears in the page. Tracking protection is blocking a Google Analytics script, and it looks like the script at https://vid.ly/6i0o7t/embed contains code to wait until Google Analytics is loaded before setting up the player. It defines a function `isGALoaded` which it calls in a setTimeout loop. The same problem also occurs with other privacy/security add-ons that block GA.
Looks like this is fixed now. The video displays and plays when opening this page in a tracking protected window.