Windows 7 display properties work a bit differently from XP (you seem to have gotten Windows XP instructions). *In Windows 7, right-clicking the Windows Desktop '''''should''''' let you change the Theme and Screen Resolution. *An alternative and to change other settings click on the Windows Start menu, and then type Display in the search box. *You can also click Personalize after right-clicking the Windows Desktop, and in the bottom left corner click Display. '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You may need to update some plug-ins. Check your plug-ins and update as necessary: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox] *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox] *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

If you have an LCD display then you should always use the native resolution of that screen to avoid degradation. With an older CRT monitor you can change the resolution if you really want to do that. There are other ways to change that appearance by adjusting the DPI (dots per inch) used to display content. Firefox also has a String pref layout.css.devPixelsPerPx that allows to adjust the size of all elements in 0.1 or 0.05 steps.