I received a solution from Canonical (Ubuntu) support. The solution is to remove the package libgraphite3 using the Synaptic package manager. Then, restarting Firefox. The problem was corrected and the screen now looks normal.
I received a solution from Canonical (Ubuntu) support.
The solution is to remove the package libgraphite3 using the Synaptic package manager.
Then, restarting Firefox.
The problem was corrected and the screen now looks normal.