Firefox unresponsive script error solve

Firefox may give you a "Warning: Unresponsive script" prompt that says "A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete." This article describes why this could happen and possible solutions and workarounds.
This error is telling you that Firefox thinks that a script may be running out of control and would make Firefox hang if nothing is done. The script could be something on a web page you're accessing, in an extension you installed, or even Firefox itself.

Solution:

Step 1

Launch Mozilla Firefox.

Step 2

Click anywhere in the address bar at the top of the Firefox window, to highlight the entire field.

Related Reading: "This Connection is Untrusted" Error on Firefox

Step 3

Type "about:config" (omit the quotes here and throughout) and press "Enter." A "This might void your warranty!" warning message may come up; if it does, click the "I'll be careful, I promise!" button to open the page that contains all Firefox settings.

Step 4

Click once in the "Search" box at the top of the page and type "dom.max_script_run_time". The setting is located and displayed; it has a default value of 10.

Step 5

Double-click the setting to open the Enter Integer Value window.

Step 6

Type "0" and click "OK" to set the value to zero. Firefox scripts now run indefinitely, and will not throw any script errors.

Step 7

Restart Mozilla Firefox.