Changing Browser Font Size 

Note: The way the author of a Web page wrote the code will influence whether you can change the font size.

Internet Explorer 7

In the upper right corner of the browser window click Page, Text Size, and select the size you want.
Page dialog box

Firefox  1.5.0.10

  1. Click the Tools menu at the top of the browser window.
  2. Click Options.
  3. Click the Content tab.
  4. Adjust the font size and color in the lower left corner of the Content dialog box.
Firefox font size and color