Originally Posted by
plunet
The twitter and YouTube previews also do not show up if you refuse nonessential cookies (might only be an option if you're in the EU)
Thanks for the inf

!
I've now set Firefox to allow all cookies from Flyertalk.com and to allow all tracking for Flyertalk.com ... with n

change to the behaviour. Firefox indicates that nothing is being blocked by showing the shield icon with a line through it on the navigation bar:

I went into the developer console to look for stuff that was not loading properly and found nothing related to Twitter in the Network screen. (I'm trying to debug using a page with a Twitter link that should show a preview). But I guess now I know that this does work for others and I may be able to fix it on my end.