On my Ubuntu 12.10 machine, I've updated Firefox to version 18 some minutes ago. After that, fonts on sites are too smooth and now it's difficult to read for me.
I found some advices about my problem like that question How do I disable font smoothing/hinting/anti-aliasing on Firefox 4? and read official forums but on my machine there are none of the following items in
And the addon Anti-Aliasing Tuner is not available for me either.
How should I fix this problem?