Websites look wrong or appear differently than they should

This article deals with websites not appearing correctly in Firefox.

Note: If you're having trouble with a website, click the padlock icon Fx70GreyPadlockFx89Padlock in the address bar to see if Firefox has blocked parts of the page that are not secure. See Mixed content blocking in Firefox for details.

Clear the cookies and cache

Firefox caches websites, 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 website 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 cookies and cache:

  1. Click on the menu button fx57menuFx89menuButton to open the menu panel. Click the Library 57 library icon button on your toolbar. (If you don't see it, click the menu fx57menu button, then click Libraryclick the menu fx89menuButton button.)
  2. Click History and select Clear Recent History….
  3. In the Time Range to clear: drop-down, select Everything.
  4. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
  5. Click OK.
Now that your cookies and cache are cleared, visit the website again to see if the problem is solved.

Reset Zoom

Some websites may not look right at different zoom levels. To reset Zoom setting, for the site, press Ctrl + 0command + 0 and for all sites, see the documentation about the Zoom add-on you use.

Reset the minimum font size

Some sites do not display properly with a minimum font size. To reset the minimum font size:

  1. In the Menu bar at the top of the screen, click Firefox and select Preferences. Click the menu button Fx57Menu and select OptionsPreferences.Click the menu button Fx89menuButton and select Settings.

  2. Select the Content panelGeneral panel and navigate to Language and Appearance.
  3. In the Fonts & Colors section, click Advanced….
  4. Change the Minimum font size to None.

Reset the page style

You may have inadvertently set the page style to No Style. To ensure Firefox is set to use the page's default style:

  • Press the Alt key to temporarily bring up the traditional Firefox menusOn the menu barAt the top of the Firefox window, click on the View menu, then select Page Style, then click Basic Page Style.

Now that the page is using its default style, it may be displayed correctly.

Check that JavaScript is not blocked

You should check whether you have an extension (such as NoScript) or Internet security program (such as a firewall, antivirus, or anti-spyware program) that can block JavaScript.

Check that your system clock is set correctly

In some instances the loading and verification of secure web content will be time-dependent, so you should check that date, time and timezone are set correctly on your system.

Disable problematic extensions or hardware acceleration

Some extensions may interfere with the way websites are displayed or your graphics card and drivers don't display some web content correctly when hardware acceleration is turned on. Follow the instructions in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to see if one of these is causing the problem.

Report the website

Occasionally you may come across a page that simply doesn't work in Firefox. If that happens, please report the problem by visiting

If you are using Firefox Beta, Developer Edition or Nightly, click on the page actions menu (three dots in the address bar) and select Report Site IssueYou can also go to the Firefox menu Fx57menu and click Help, then select Report Site Issue.


Based on information from Websites look wrong (mozillaZine KB)

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