Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the add-ons (possibly AVG Safe Search) is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.

See:

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

I'm sorry but I'm only 10 years old, and english is my second language... can you please briefly explain this to me or if you may, please give step by step instructions. Like how to start Firefox in Safe Mode. Thanks I highly appreciate your help.

What is your native language?
Maybe there is a forum in that language.
Firefox 4 no longer has the language in the user agent, so I can't

Also make sure that you open the Knowledge Base articles in your native language.

You can change the en-US in the link to the language code that you see in the location bar on this page (http://www.mozilla.com/en-US/firefox/all.html). Use the other languages drop down list at the bottom of the page to change to your native language.

This change shows the KB page in the French language for example.

• https://support.mozilla.com/fr/kb/Safe%20Mode

I speak tagalog and I understand English very well, its just that the link you gave me have instructions that are complex. Some words that I don't know what it means.

You can go to "Help > Troubleshooting Information" and copy the content to the clipboard and paste it in the reply form.

Do you have the English Firefox version?

Do you have AVG extensions installed ?
You can see the extensions in Firefox (or Tools) > Add-ons > Extensions

You can use "Help > Restart with Add-ons Disabled" to start Firefox in Safe mode.

• Click the first entry to check mark [X] Disable all Add-ons

That will start Firefox with all extensions disabled.

thanks