The JavaScript Debugger enables you to step through JavaScript code and examine or modify its state to help track down bugs.
You can use it to debug code running locally in Firefox or running remotely, for example on an Android device running Firefox for Android. See remote debugging to learn how to connect the debugger to a remote target.
Firefox Developer Tools. A set of tools for inspecting and editing web code. Our team works closely with the community and is always happy to. Mozilla Firefox for Windows and Linux 89.x is a fast, free, and Open Source web browser that provides you with a highly customizable interface with numerous third-party add-ons, as well as multiple Mozilla authored add-ons. You will have access to tabbed browsing, spell checking, incremental find. I've attached a screen grab of the what happens when Firefox is open normally. The developer tools opens on the console tab. Again, thanks for the help. Mozilla Firefox' It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling. The Firefox JavaScript Debugger The JavaScript Debugger enables you to step through JavaScript code and examine or modify its state to help track down bugs. You can use it to debug code running locally in Firefox or running remotely, for example on an Android device running Firefox for Android.
To find your way around the debugger, here's a quick tour of the UI.
How to
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To find out what you can do with the debugger, refer to the following how-to guides.
Pause execution
You probably want to pause the execution of your code, in order to see what is going on at various points. There are multiple ways to tell the Debugger how and when to pause:
Control execution
What can you do after execution pauses?
Look at values
You probably want to see the value of variables or expressions, either during execution or when it is paused.
Mozilla Firefox Developer Tools
Reference