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

How do I use the debugger tool (in plain English, please)?

  • 4 cavab
  • 1 has this problem
  • 9 views
  • Last reply by FredMcD

more options

A box appears with the message about a long-running script and the option to debug. How does this tool work and where are the instructions?

A box appears with the message about a long-running script and the option to debug. How does this tool work and where are the instructions?

All Replies (4)

more options
more options

Are you debugging scripts that you wrote? Or random scripts that Firefox reports are problematic?


If you see this dialog often, one potential cause is the protected mode feature of the Flash player plugin. That feature has security benefits, but seems to have compatibility issues on some systems. You can disable it by creating or editing a settings file. The following pages/posts provide different approaches for that:

Flash needs to completely unload from memory (exiting and starting Firefox up again might help) before this takes effect.

Any improvement?

more options

There is usually no need to debug the script unless you are its developer and are familiar with the scripts that run on the web page.

What page(s) give you this error and what script(s) does this alert mention?

more options

Contact the writers of the program and let them know.