Wikipedia:Tools/Browser tools/Mozilla Firefox/Search within Textarea Extension with regex

Description
 * This extension will allow Firefox users to search within the textarea when editing articles.

Installation
 * Install from here. You may need to add bugzilla as an allowed website.

Usage
 * The textarea needs to be focused (the cursor needs to be on it) and then press Ctrl+F for the Find Dialog to appear.

Update
 * A bookmarklet found here. The bookmarklet can search within the textarea using regular expressions.

Update2
 * Mozilla Firefox 2.0 has this feature, except it has no search/replace feature.