The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

I do it,But my problem don't solve.

Run all Windows Updates, install all needed service packs, etc.

Update your graphics driver (Firefox uses your graphics card for some rendering, and an out of date graphics card driver can cause problems. Upgrade your graphics drivers to use hardware acceleration and WebGL

Update all your plugins (Flash, Java, etc.): http://www.mozilla.org/plugincheck/.

Download and Install MalwareBytes Anti-Malware, run a full Scan. http://www.malwarebytes.org/. This helps check that there are no viruses on your computer causing issues. You can uninstall this program after you clean off any infections.

My problem don't solve yet.

I see that there are a lot (37) of Flash objects are present on that page.

Does this still happen with plugins like Flash disabled?

You can temporarily set the plugins.click_to_play pref to true on the about:config page to see if that helps.

• http://kb.mozillazine.org/about:config

Note that this may cause problems with other plugins like the Adobe Reader and Java.

• https://wiki.mozilla.org/Opt-in_activation_for_plugins

You can check for problems caused by a recent Flash 11.3 update and possibly downgrade to Flash 11.2 or 10.3 or disable protected mode in Flash 11.3 or disable hardware acceleration in the Flash plugin.

• http://kb.mozillazine.org/Flash#Flash_Player_11.3_Protected_Mode_-_Windows

• https://support.mozilla.org/kb/flash-113-doesnt-load-video-firefox
• https://support.mozilla.org/kb/flash-113-crashes