This issue has persisted for a while now. When
I open https://extensions.gnome.org/
in Firefox, I cannot see any words. However, it's
fine in Chrome. If I open the developer tool in
Firefox, the words are there but just somehow not
displayed.
I am on Ubuntu 17.04, Firefox 55.0.2 as well as
57.0b5.
1. Try to press "Ctrl+F5"
2. Look to console at developer tool - are there any
errors here?
3. Get a screenshot and post it here.