FF 32 - web pages -Change font color

[uncle]

Not sure which board is most appropriate for my question....

I am trying to see a darker font on web pages. The 'headline' colors on pages are fine, but the other text is a very light gray. (Even here, the text in Subject is a bit too light for my easy viewing.) I have unchecked 'Allow pages..." in both color and advances windows, but that didn't change anything.
This doesn't seem to be dependent upon a particular site--they all display the same light gray
Is there something else I should be doing? Thank you.

[Rudi]

First try the steps in this web page to modify the text colour:
Change the fonts and colors websites use

If that does not help, you might have a theme running that has modified the text to grey. Try changing it back to the FF default theme:
Use themes to change the look of Firefox

[uncle]

Thank you, Rudi.

I had tried the options in the Content tab and none seemed to 'take.' Even changed text color to red to see what would happen, and nothing happened.

I only use FF's default theme. So something is going on with my setup, I guess.

Thanks for all your suggestions.