Toggle CSS outline

Simple extension that toggles a red outline around all elements in a page on/off, useful for CSS debugging.

Toggle CSS outline is available to install from Firefox Browser Add-ons and for download from this page. It has 58 active users The latest version is 1.1, and it was published a year ago.

Install from Firefox Browser Add-ons
View source code
Total download count: 0 (Only count downloads from Firefox-Stats)

All available versions

You can find the current and older versions of Toggle CSS outline here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

Upgrade to download older versions
 1 version available for download.

Install XPI file

  1. Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  2. In Firefox browser, go to about:addons to open Add-ons Manager
  3. Click on , then select Install Add-on From File
  4. Select the Toggle CSS outline ZIP file from step 1. Toggle CSS outline is now installed on your browser.