How can I force firefox to display all page specific font?

Question

I chrome browser I use Change font family to force chrome to do this, but I in firefox I didn't find any way to do this. unboxing allow page to choose their font in Firefox doesn't work properly.

Answer 1

Here are a few solutions:

1. Just go to Tools>Options, go to the content tab, and click on the Advanced button. Once there, set the font styles the way you like them, and uncheck the Allow pages to choose their own fonts, instead of my selections above option.
2. Use the View>Page Style menu and select No Style
3. Set the fonts for individual pages or many pages at once with Stylish (https://addons.mozilla.org/en-US/firefox/addon/stylish/)

Answer 2

The CSS code for Stylish would be something like

html * {font-family:Arial !important;}