Hi DanRiech,

I'd try starting Firefox in Diagnose Firefox issues using Troubleshoot Mode. If you don't have the issue while all of your add-ons, extensions, and themes are disabled, you can try adding them back in one by one until you find the culprit. You should look at the Extensions and Themes troubleshooting guide and the Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems article as well.

Hopefully this helps!

Does the code work if you paste this data URI in the location bar on an empty tab?

data:text/html;charset=utf-8,<div id="Layer8"><span class="footer">&nbsp;&nbsp;&nbsp;Like us on Facebook:</span><iframe src="http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2FDownsizedLivingMagazine&amp;width=292&amp;colorscheme=light&amp;show_faces=false&amp;border_color&amp;stream=false&amp;header=true&amp;height=67" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:292px; height:67px;" allowTransparency="true"></iframe></div>

If images are missing then check that you aren't blocking images from some domains.

• Check the permissions for the domain in the current tab in "Tools > Page Info > Permissions"

• Check that images are enabled: Firefox > Preferences > Content: [X] Load images automatically
• Check the exceptions in "Tools > Options > Content: Load Images > Exceptions"

• Check the "Tools > Page Info > Media" tab for blocked images (scroll through all the images with the cursor Down key).

If an image in the list is grayed and there is a check-mark in the box "Block Images from..." then remove that mark to unblock the images from that domain. Make sure that you do not block third-party images, the permissions.default.images pref should be 1.

• http://kb.mozillazine.org/Images_or_animations_do_not_load

There are also extensions (Tools > Add-ons > Extensions) and security software (firewall, anti-virus) that can block images.

See also:

• http://kb.mozillazine.org/Images_or_animations_do_not_load
• https://support.mozilla.org/kb/Images+or+animations+do+not+show

Not sure if this will show the button, but it fixed the functionality issue I was having in the latest FF on Mac.

Check your prefs for third-party cookies.

I tried to allow them until I close Firefox, but that did not seem to work (searches on the net indicate it has for some people).

I had to create an exception for fb, allowing for the session. That seems to work.