This is a recent problem and I doubt it's exclusive to myself.
Firstly, this isn't a problem in Chrome at all, but I prefer Firefox (as do many others). Also, it was fine in Firefox before maybe 1 1/2 weeks ago.
Neither embedded Tweets nor the latest Tweets from my own account down the right are appearing in Firefox. Here's a screen grab to show the issue:
Yet in Chrome: http://i.imgur.com/OronbnJ.jpg
What I've done to try and sort it: cleared cache, disabled AdBlock addons, asked 2 other people using Firefox (same problem)
I'm on a WordPress hosted site (for the time being) so am not sure there is much I can do manually to fix it.
The blog I need help with is thatkunaguero.wordpress.com.