Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I can't use Firefox, AddThis has frozen the screen and it's useless--using IE now. What can I do?

more options

Yesterday I added AddThis extension to Firefox and when it installed on opening this morning, it freezes the whole browser.

I can't go anywhere else, only the "install AddThis" box, none of the other toolbar icons work, and neither do keyboard shortcuts. I can close the whole browser using Control/Alt/Delete, etc. But I need my browser. Please help!

Yesterday I added AddThis extension to Firefox and when it installed on opening this morning, it freezes the whole browser. I can't go anywhere else, only the "install AddThis" box, none of the other toolbar icons work, and neither do keyboard shortcuts. I can close the whole browser using Control/Alt/Delete, etc. But I need my browser. Please help!

Saafara biñ tànn

Open Firefox in the Firefox SafeMode. Hold the Shft key when you double-click the Firefox desktop icon. Don't select anything except for Continue in SafeMode.

Then do Ctrl+Shft+A to open the Addons Manager tab. Under Extensions hit the Remove button for that extension.

Then close Firefox.

Hopefully your freezing problem will be solved.

Jàng tontu lii ci fi mu bokk 👍 0

All Replies (3)

more options

Saafara yiñ Tànn

Open Firefox in the Firefox SafeMode. Hold the Shft key when you double-click the Firefox desktop icon. Don't select anything except for Continue in SafeMode.

Then do Ctrl+Shft+A to open the Addons Manager tab. Under Extensions hit the Remove button for that extension.

Then close Firefox.

Hopefully your freezing problem will be solved.

more options

This was a lifesaver! Thank you so much!

more options

You're welcome!