This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Why firefox doesn't display js properly with javascript view activated

more options

I am viewing JavaScript lessions and the lessons test to see javascript view is installed and activated. I installed the javascript view and activated it and it still does not display as the lessions say it should. The display of the code is as a negative with the background black and the letters white and not a box with "hello world" displayed..

I am viewing JavaScript lessions and the lessons test to see javascript view is installed and activated. I installed the javascript view and activated it and it still does not display as the lessions say it should. The display of the code is as a negative with the background black and the letters white and not a box with "hello world" displayed..

All Replies (2)

more options

Note that current Firefox releases have a built-in JavaScript beautifier available as the jsb command in the developer toolbar (Shift+F2).
This can also be used with all text (JavaScript) files and not only with files that the JavaScript viewer extension detects.

more options

Does the viewer have a button to actually run the script? If not, try running it from inside a web page.