Home | Legacy Firefox Extensions | Content Policy | Contact



As of Firefox 1.5, the JavaScript Console is used not only for JavaScript errors, but for CSS errors as well. This extension takes this into account by providing a simple possibility to display errors by type.

Console² let's you display errors filtered by type (Errors, Warnings, Messages), language (JavaScript, CSS, XML) and context (Chrome, Content). Furthermore it provides a simple search box (as seen in the History and Bookmarks sidebars), hiding of duplicates, sidebar optimizations, a customizable toolbar and some more accessibility improvements.

From v0.5 includes the Console Filter extension previously available separately from the Console² website.

* To use the Console Filter searchbox, right click on a toolbar in the Console² window and select "Customize...". Then drag the CF searchbox on to a Console² toolbar.

* The filter syntax is basically "Google Lite" The messages in the console are searched for all terms entered (AND search), but must not contain any terms preceded by a minus sign (NOT search). Terms inside quotations marks must be found in that order (exact phrase).

error -expect "declaration dropped"

* For more on the filter syntax please see http://console2.mozdev.org/cf/index.html

Latest release: Console² 0.9
This release version works with Firefox 3.0 to 11.0, Thunderbird 3.0 to 11.0, SeaMonkey 2.0 to 2.8, and most probably the current trunk/branch nightlies.

What's New
* [new] Message FIFO limit is now controlled by a hidden preference "extensions.console2.max-errors" currently 1000. (Patch by Kris Maglione).
* [new] Enable blocklist domains from resource:// URLs
[new] Enable filter for "resource://" URLs
[fix] Alias resource:/// to resource://app/ to allow these resource urls to be filtered and blocklisted.
(Patches by titoBouzout).
* [fix] Use white-space: pre-wrap for the console message descriptions to allow newlines and formatted messages (Patch by titoBouzout).
* [new] Add support for Komodo alphas appversion >= 6.9 (Patch by titoBouzout).
* [fix] css problems with textonly toolbarbuttons in icon mode toolbars.
* [new] Show timestamps if available from nsIScriptError/nsIScriptError2.

Download files:


This page is part of the LegacyCollector website.
Disclaimer: All material on this site is property of their respective owners and available under
open licenses to the best of our knowledge. If you are an author and would like anything removed,
then please write an e-mail to legacy [at] collector dot org.