If the problem is system wide you will need to look at your Windows XP display settings.

If the problem is only with Firefox;

• if it is with the content of the page, is it just that the text is too small, if so use the zoom controlls, eg press keyboard keys Ctrl + + (press and hold the Control key, then also press the plus key ) Ctrl + - reduces size Ctrl + 0 (zero the number) resets to 100%

• There are also software extensions that can be used to improve things, and a firefox preference that also changes the size of the firefox interface items such as the menu items.

Blurry Fonts

• https://support.mozilla.com/en-US/kb/fonts-look-blurry
• https://support.mozilla.com/en-US/questions/861223

How do I use Zoom?

• https://support.mozilla.com/en-US/kb/how-do-i-use-zoom

The Firefox Page Zoom feature does a domain by domain level of saving the users preferred zoom level settings, there is no default Page Zoom level setting in Firefox.

Try the Default FullZoom Level 4.5 extension:

• https://addons.mozilla.org/en-US/firefox/addon/6965

Or the NoSquint 2.1.2 extension:

• https://addons.mozilla.org/en-US/firefox/addon/2592/

Check and tell if its working.