This article explains how to fix problems with websites that display incorrectly in Firefox or don't work the way they should.
- If you receive error messages when trying to load websites, see the Websites don't load - troubleshoot and fix error messages article instead.
- For problems viewing images on websites, first read Fix problems that cause images to not show.
- For problems with audio or video content on websites, see Fix common audio and video issues.
Table of Contents
- 1 Clear the cookies and cache
- 2 Reset Zoom
- 3 Reset the minimum font size
- 4 Reset the page style
- 6 Check that your system clock is set correctly
- 7 Disable problematic extensions or hardware acceleration
- 8 Check if Firefox has blocked insecure content
- 9 Turn off Enhanced Tracking Protection for the website
- 10 Report the website
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:
- Click on the menu button to open the menu panel. Click the Library button on your toolbar. (If you don't see it, click the menu button, then click click the menu button.)
- Click and select .
- In the Time Range to clear: drop-down, select Everything.
- Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
- Click .
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:
In the Menu bar at the top of the screen, click and select .Click the menu button and select .Click the menu button and select .
- Select the panel and navigate to Language and Appearance.
- In the Fonts & Colors section, click .
- Change the Minimum font size to None.
Reset the page style
You may have inadvertently set the page style to. To ensure Firefox is set to use the page's default style:
- Press the Alt key (or the AltGr key) to temporarily bring up the Firefox Menu barOn the menu bar at the top of the Firefox window, click on the menu, then select and click .
Now that the page is using its default style, it may be displayed correctly.
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.
Check if Firefox has blocked insecure content
Firefox blocks potentially harmful, insecure content on web pages that are supposed to be secure. Click the padlock icon in the address bar to see if Firefox has blocked insecure parts of the page. See Mixed content blocking in Firefox for details.
Turn off Enhanced Tracking Protection for the website
Sometimes Enhanced Tracking Protection can cause site breakage when tracking content is blocked. To disable tracking protection for the website:
- Click the shield in the address bar to open the Protections panel.
- Click the blue toggle switch. The page will reload with Enhanced Tracking Protection turned off.
This will allow trackers to load on that site only. Trackers will continue to be blocked on other sites.
Report the website
If turning off Enhanced Tracking Protection allows a page to display and work correctly, you can report the website to help improve Firefox. See the Report breakage due to blocking article for more information.
Occasionally, you may come across a page that simply doesn't work in Firefox, even when Enhanced Tracking Protection is turned off. If the same page works in another browser, please report the problem by visiting Webcompat.com.
Based on information from Websites look wrong (mozillaZine KB)