I have seen that this question has been raised in the past and the OP was able to resolve it by turning on smooth text, but my settings are default yet there compared to the foxit and web viewer the pdf font texts in Adobe Acrobat are thinner, which is quite a strain on eyes. I have also tried changing the custom resolution but that also as such doesn't have any effect.
View in Foxit
View in Adobe Acrobat
Acrobat Settings
