If the font is too small click and hold control key then click the +bar at the extreme right side of keyboard. You can do this repeatedly until the font is large enough for you to read.

tried holding the control key and clicking the + but not change on the screen

Websites look wrong

• https://support.mozilla.com/en-US/kb/Websites%20look%20wrong

Check and tell if its working.

I checked everything in mha007's reply, but nothing changed. I haven't used Firefox in a long time, and now I remember why. I really don't like the way the sites are displayed, including the one I'm on right now. They only use the middle 1/3 of my screen, which results in everything being too small. I have upgarded to the most recent version of Firefox, but that didn't help, either. I am running Windows 7. My continuing problems with IE, and now this issue with Firefox leaves me at the mercy of Google Chrome. I really like the way Firefox handles tabs, because I like to keep a lot open, but don't want to have all the tabs displayed at once. However, the inability to get the web sites at a decent size is stopping me from using Firefox. If you come up with a solution, please let me know.

Reset the page zoom on pages that cause problems.

• View > Zoom > Reset (Ctrl+0 (zero); Cmd+0 on Mac)

• http://kb.mozillazine.org/Zoom_text_of_web_pages

You can use an extension to set a default font size and page zoom on web pages.

• Default FullZoom Level: https://addons.mozilla.org/firefox/addon/default-fullzoom-level/
• NoSquint: https://addons.mozilla.org/firefox/addon/nosquint/