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!

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

• Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

• Do not click the Reset button on the Safe mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode

There are other things that need your attention.

Please Update to the latest Firefox 17.0.x version.

• Help > About Firefox

• https://support.mozilla.org/kb/update-firefox-latest-version

The Firefox Firefox/14.0.1 version that you currently run is no longer supported with security updates.

• http://www.mozilla.org/security/known-vulnerabilities/firefox.html

The Proplem is Now Gone

Thanks for Your hard work . Greeting from Egypt.

I had this problem in Mozilla also. I read many posts on many forums for possible fixes, and I tried many of them. None helped. In fact, some (like updating to most recent version) made things worse. My computer was almost useless if I had Mozilla open because of constant "unresponsive script" errors and the hangups associated with them. So far I haven't seen the fix that worked for me, so I thought I would add it here.

I simply did not have enough RAM. This is an inherited machine, and while I was faithfully cleaning it up and upgrading software and security features as necessary, I didn't think to look at the hardware. I upgraded to 4GB RAM from the 1GB I had, and poof - entire problem solved. It's been a few weeks and I haven't had a single "unresponsive script error". I didn't change anything else at the time the problem went away, so the RAM was definitely the issue.

Most folks would probably check that first (I'm not very computer savvy), but just in case it helps someone else . . . .

RAM isn't the problem here. I upgraded to 4 gig, run Fedora 18, and I'm getting the scripts errors still. I have tried numerous Add-ons. The problem, I believe, is conflicting script between websites, in particular FACEBOOK and GOOGLE. The scripts go between the websites that you visit and talk to each other tracking your browsing (apps). This is done to allow sharing between sites like Facebook and others. If the sites were written in HTML5, I believe the problems would go away. Using legacy browsers maybe solve some of the problems, but I think it's the script writers causing the problems. Noscript would be the best Add-on, but it's not too versatile. If the writers of Noscript could enable me to block a specific script, it may help (the Add-on Refreshblocker 0.8 is useless for this). FACEBOOK is the problem because the scripts there follow you everywhere you go on the web. Close FACEBOOK delete entire history, cookies, everything, problem solved, (except for maybe Google). If you don't open Facebook or Google, the problem should not recur. That's what I'm doing, weening myself off of Google and Facebook because they track us everywhere we go. Good Luck and godspeed.