Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Why do i keep getting Java Script Application saying uninstal and every time i click on my mouse the pop up appears and its sometimes hard to get rid of it. Please help. God Bless

more options

As soon as I log on to Firefox this pop up appears on the screen saying Java Script Application and under neath it it says uninstal and beside uninstal is a yellow triangle with a exclamation mark inside of it. Every time I click the mouse the pop up reappears over and over. It's really a nuisance and I need your help.The word uninstal is spelled like you see it, even though it's spelled wrong.Thank you and God Bless

As soon as I log on to Firefox this pop up appears on the screen saying Java Script Application and under neath it it says uninstal and beside uninstal is a yellow triangle with a exclamation mark inside of it. Every time I click the mouse the pop up reappears over and over. It's really a nuisance and I need your help.The word uninstal is spelled like you see it, even though it's spelled wrong.Thank you and God Bless

All Replies (1)

more options

Other users have reported that this is caused by one of their add-ons. I suggest going to the Add-ons page and disabling everything that is not essential, and then restarting Firefox. Hopefully it's not caused by something you really rely on.

orange Firefox button or Tools menu > Add-ons

On the left side, click Extensions

Then disable as many as possible and restart Firefox.

Any luck?