This question was brought to my attention…Some users have reported that the FontAwesome icons used in the website are not compatible with Firefox. While this could be true, my own Firefox seems to work fine.
Any suggestions on solving the issue? Maybe try resetting your Firefox settings?
If you are talking a site out side ogs would be nice to give a link to it.
With my Linux Firefox 34.0.5 and noscript and adblock, obscure signs look like this.