Firefox webpage font?

How do I make all pages have white fonts? On some forums/pages it is gray so hard to see.

The easiest way would be to edit the settings of Firefox.

Settings → General (tab) → Colors → Manage Colors… → change the colors according to your preferences (black background, white foreground) → under Override the colors specified by the page with your selections above select Always → OK.

Alternatively, you can fiddle with userChrome.css in your profile folder.

Lots of Firefox addons will do the job for you:

Two addons I personally use & recommend are Dark Reader:


There’s also Simple Night Mode, which does a reasonable job with most of the websites I regularly use. It toggles everything, not just the page you’re on, but it’s quick.

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This one here might have what you need

Firefox/Tweaks - ArchWiki