Created attachment 8720747 [details] Screencaps-Firefox.png User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20160209234513 Steps to reproduce: I have no idea how to reproduce this since I don't see that problem on other computers: http://www.gnome.org/ http://www.drgoulu.com/ Until now, these are the only 2 problematic websites for me. Actual results: See attachment. Expected results: I guess there is an interference with something else on my computer but I have no idea how to find out. Safe mode doesn't fix the problem. No problem with Chromium or Epiphany.
Can you test with a fresh profile? Same issue? https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
Doesn't change anything...
There is surely an issue about loading the fonts from the machine.
Any direction how to debug this?
Check the web/browser console in Firefox.
Nothing in the web console... Figured out it was a problem with Cantarell. Reinstalled my local copy and it's now working fine. Marking as invalid though I'm not sure there wasn't any bug on Firefox side ;-)