This article deals with web sites not appearing correctly in Firefox. If you receive error messages when trying to load web sites, see the Error loading web sites article instead. If any of the more specific articles below apply to you, see those articles first.
You may have inadvertently set the page style to "No Style." To ensure Firefox is set to use the page's default style:
Now that the page is using its default style, it may be displayed correctly.
Firefox caches web sites, which means it saves some files on your machine so that it doesn't have to re-download everything when you visit sites. If a web site has updated their code, Firefox may still be using some of the old code along with some of the new, which can make a web page display incorrectly. To fix this, you need to clear the cache.
Some web sites may not look right at different zoom levels. To reset the page zoom setting for the site, click on the View menu, select Zoom, and then select Reset.
Some web sites may not look right at different zoom levels. To reset the page zoom setting for the site, click on the View menu, select Text Size, and then select Normal.
Some sites do not display properly with a minimum font size. To reset the minimum font size:
A small minority of pages simply don't work in Firefox. While you can't immediately fix the problem, you can report the website to the Firefox developers and they can either fix the problem in Firefox or contact the owner of the site. To report a broken web site:
Based on information from Websites look wrong (mozillaZine KB)
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