anti-aliasing doesn't seem to do anything. making pixel art fonts, there's way too much anti-aliasing happening that the font looks "blurry". Not sure you can do anything about it.
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The browser controls the anti-aliasing, so my capabilities are limited. However, I just checked that on Firefox, anti-aliasing is enabled by default - that's why turning it on here makes no difference. On Chrome, anti-aliasing is off by default, so on this browser, controlling this option works as intended.
If I diagnosed the problem correctly, try using Chrome. I will further analyze the issue with Firefox and see if it can be fixed.
If you're using Chrome and still see the problem, please send the font and a screenshot of how it looks on your end. I don't see any issue on Chrome.