| XPath Checker | | - | | |
| XSS Me | | - | | |
| XUL gear | | - | | |
| Xinha Here! | | - | | |
| XmlUtils | | - | | |
| YSlow | | - | | |
| Zaqwes Guide Lines | | - | | |
| anchors-reveal | | - | | |
| awesome-timestamp | | - | | |
| awetest recorder | | - | | |
| colorPicker | | - | | |
| defyFormValidation | | - | | |
| docked JS-Console | | - | | |
| eyedropper Button | | - | | |
| eyedropper_restartless | | - | | |
| favicollect | | - | | |
| fi | | - | | |
| fireword beta | | - | | |
| font infos | | - | | |
| fontinfo | | - | | |
| fragment | | - | | |
| french-press | | - | | |
| friendly bug | | - | | |
| fulmo | | - | | |
| jspanel | | - | | |
| measurer | | - | | |
| microspect | | - | | |
| mozcmd | | - | | |
| notice noindex | | - | | |
| pesticide | | - | | |
| quit gcli | | - | | |
| retire.js | | - | | |
| rightclickxss | | - | | |
| rogumecopy | | - | | |
| rogumetool | | - | | |
| ruler | | - | | |
| ruler_guides | | - | | |
| showHTML | | - | | |
| source-gcli-jetpack | | - | | |
| steplog | | - | | |
| toggleconsole | | - | | |
| toggleresponsive | | - | | |
| watir-context-menu | | - | | |
| xpathprototyping | | - | | |
| xqjs | | - | | |
