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Strict code checking If you set the pref javascript.options.strict to true, the JavaScript engine gives you more types of warnings on the Error Console, most of which hint at code bugs Rated 5 out of 5 stars (3) 1,847 users Download Now This add-on is not compatible with your version of Firefox because of the following: Download Anyway Console² Requires Restart Console² Check out our Mobile Add-ons site. To enable it set the preference to true in about:config, or set the "Enable chrome debugging" option in the developer tool settings.

To see it, press ctrl + shift + j. In Firefox, the Error Console can be opened from the tools menu or by Ctrl-Shift-J. Accessing the Error Console After toggling the preference from false to true, one can access the Error Console inside Firefox Mobile’s preference panes [caption id="attachment_25763" align="alignnone" width="210"] Preferences[/caption] One can access Not the answer you're looking for?

In Firefox, the Error Console can be opened from the tools menu or by Ctrl-Shift-J. On the other hand, I don't recall Firefox updating in the last couple days, but what could I have done to remove it by accident? more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Rich output See and interact with objects logged by the Console.

But while the Web Console executes code in the page window scope, the Browser Console executes them in the scope of the browser's chrome window. Like the Web Console, the command line interpreter enables you to evaluate JavaScript expressions in real time:Also like the Web Console's command line interpreter, this command line supports autocomplete, history, and To bring up Error Console from within a browser or mail window, use the function toJavaScriptConsole(). See Also Debugging Mozilla with gdb Setting up an extension development environment (particularly development preferences and development extensions) Original Document Information Author(s): Ben Bucksch Created Date: September 12, 2005, Last Updated Date:

This example here makes it so that when you mouse over the "Clear" button it will clear the Browser Console: Components.utils.import("resource://devtools/shared/Loader.jsm"); var HUDService = devtools.require("devtools/client/webconsole/hudservice"); var hud = HUDService.getBrowserConsole(); var clearBtn I appreciate the web/browser console, but sometimes I just need quick access to see script errors. Open a different sidebar by just clicking its title. Add a translation Edit Advanced Advanced History Print this article MDN Mozilla QA: Quality assurance at Mozilla Firefox Mobile: Enabling the Error Console Your Search Results pragmatic mwargers Firefox Mobile: Enabling

Console.log in Browser Console You can dump variables in the Browser Console from addon code, by adding this line to import the console utility: const { console } = Components.utils.import("resource://gre/modules/devtools/Console.jsm", {}); share|improve this answer answered Jun 23 '12 at 3:33 McGarnagle 73.3k18133184 4 I don't want the error console being open if there's no error and I certainly don't want to On Windows, the following code will add a new item to the browser's main menu: var parent = window.document.getElementById("appmenuPrimaryPane"); var makeTheTea = gBrowser.ownerDocument.defaultView.document.createElementNS("", "menuitem"); makeTheTea.setAttribute("label", "A nice cup of tea?"); parent.appendChild(makeTheTea); Warning usually lets the program compile but warns of bad coding and suggests design flaws.

This means you can interact with all the browser's tabs using the gBrowser global, and even with the XUL used to specify the browser's user interface. In debug builds this also dumps a stack trace to the console, even when the debugger is not running. Template: Free CSS Templates current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Messages from add-ons The Browser Console displays messages logged by all Firefox add-ons.

Has it been removed? Components.utils.import("resource://gre/modules/Console.jsm"); console.log("Hello from Firefox code"); //output messages to the console Learn more: console API reference Console.jsm source code in the Mozilla DXR HUDService There is also the HUDService which allows access Rated 4 out of 5 stars (13) 313 users Download Now This add-on is not compatible with your version of Firefox because of the following: Download Anyway Report bugs and issues in about:config (add new pref, it doesn't exist per default).

Use the Web Console or the Browser Console instead. Please ask a new question if you need help. Use with caution. Split console Use the Console alongside other tools.

Rated 4 out of 5 stars (1) 69 users Continue to Download→ This add-on is not compatible with your version of Firefox because of the following: Download Anyway To create your Components.utils.import("resource://gre/modules/Log.jsm"); "debugger" keyword You can halt Venkman or Chromebug at a line using the keyword debugger. If anyone has tips on why it would have gone away, that's appreciated. About MDN Terms Privacy Cookies Contribute to the code Other languages: English (US) (en-US) 中文 (简体) (zh-CN) Go Mozilla Register or Log in Other Applications Thunderbird Firefox for Android SeaMonkey Add-ons

To see anything, you need to set the pref browser.dom.window.dump.enabled to true, e.g. About MDN Terms Privacy Cookies Contribute to the code Top Firefox Web Development Tools By Deron Eriksson avaJava Home Top Firefox Web Development Tools About Us Contact Us #3: Error Console when a solution is found. In extensions you can print the callstack using Components.stack like this: function getStackDump() { var lines = []; for (var frame = Components.stack; frame; frame = frame.caller) { lines.push(frame.filename +

Skip to main content Select language Skip to search mozilla Mozilla Developer Network Sign in Sign in or create an account: GitHub Sign in: Persona Web Platform Technologies HTML CSS JavaScript ori999 Posted 6/19/13, 2:51 PM Question owner Hmmm, so it was removed? asked 4 years ago viewed 4365 times active 4 years ago Visit Chat Related 6553How do JavaScript closures work?4434JavaScript function declaration syntax: var fn = function() {} vs function fn() {}283JavaScript Is there any job that can't be automated?

If so, is there an extension being used by people who still want this feature? However, rather than logging this information for a single content tab, it logs information for all content tabs, for add-ons, and for the browser's own code. Keyboard shortcuts Shortcut reference.