If you visit websites and Firefox gets stuck by a script error with the message “Unresponsive Script error” then it is advisable to take the following steps in this instruction to solve the problem.
Unresponsive Script error originates from an internal or external script on the website you are visiting, this unresponsive script prevents Firefox from successfully loading the entire website.
If the Unresponsive Script error occurs, Firefox will ask you what you want to do with the script, if you still want to continue loading the script, debug the script or to stop loading the script. If you have stopped the unresponsive Script, it is possible that Firefox has not fully loaded the website.
How to solve Unresponsive Script error in Firefox
Open Firefox, if you didn’t already. In the address bar type: about:config
In the warning screen, accept the risk and continue with Firefox configuration settings.
Disable Flash Player protected mode
In the search bar type: dom.ipc.plugins.flash.disable-protected-mode
Change the boolean type from false to true by double-clicking on it. Doing so will disable Flash Player protection mode in Firefox and solve the unresponsive script error in Firefox related to Adobe Flash.
Restart Firefox for the changes to take effect and see if the unresponsive script error is solved.
Reset Firefox settings
The next step you want to perform if the problem is not solved is to reset Firefox settings.
Resetting Firefox will change all settings to default as if you had just installed Firefox, this can help you to identify the root cause of the unresponsive script error.
After the Firefox reset you can find your old Firefox data in a folder called “Old Firefox data” on your Windows Desktop.
How to Restore old Firefox data.
In the address bar type: about:support
Click the Refresh Firefox button in the “Give Firefox a tune-up” section. Confirm the reset by clicking Refresh Firefox in the confirmation dialog.
This will: remove your add-ons and customizations and restore your browser settings to their defaults.
I hope this article has helped you fix the unresponsive script errors in Firefox!