| AMF Explorer | | - | | |
| ASP.NET Viewstate Viewer | | - | | |
| Acebug | | - | | |
| AdMatrix Analytics | | - | | |
| Add-on SDK Examples | | - | | |
| Adobe BrowserLab for Firebug | | - | | |
| Advanced Frame Designer | | - | | |
| Affilorama SEO Toolbar | | - | | |
| Animat | | - | | |
| Auto Reload | | - | | |
| Auto-Open Browser Console | | - | | |
| Blank Scratchpad | | - | | |
| Browser Calories | | - | | |
| Browser Console Button | | - | | |
| CSS Reload | | - | | |
| CSS Reloader | | - | | |
| CSS Usage | | - | | |
| CSSViewer | | - | | |
| CSSsir | | - | | |
| CacheToggle | | - | | |
| Chrome List | | - | | |
| CodeBurner for Firebug | | - | | |
| CodeBurner for Firefox | | - | | |
| ColorZilla | | - | | |
| Colorblind Design | | - | | |
| Colorizer | | - | | |
| Console2 | | - | | |
| Context Font | | - | | |
| CookieWatcher | | - | | |
| Copy HTML | | - | | |
| Copy Link as HTML or Markdown Code | | - | | |
| Copy as Markdown | | - | | |
| DOM Inspector Toolbar Button | | - | | |
| Deepest Sender | | - | | |
| Default Responsive Design View | | - | | |
| Dev Buttons | | - | | |
| DevPrefs | | - | | |
| DevTools toolbar items | | - | | |
| Developer Tools - toolbar button | | - | | |
| Display ＃Anchors | | - | | |
| Dummy Images | | - | | |
| Dust-Me Selectors | | - | | |
| EditCSS | | - | | |
| Element Digger | | - | | |
| Event Spy Too | | - | | |
| Execute JS | | - | | |
| Extension Developer | | - | | |
| Extension source viewer | | - | | |
| Extinctor | | - | | |
| FireClosure | | - | | |
| FireDiff | | - | | |
| FireFontFamily | | - | | |
| FireHiddenView | | - | | |
| FireMobileSimulator | | - | | |
| FireQuery | | - | | |
| FireRainbow | | - | | |
| FireRuler | | - | | |
| FireSSH | | - | | |
| FireStorage | | - | | |
| FireStorage Plus! | | - | | |
| FireXPath | | - | | |
| Firebug | | - | | |
| Firebug Autocompleter | | - | | |
| Firebug Paint Events | | - | | |
| Firefinder for Firebug | | - | | |
| Firefox Accessibility Extension | | - | | |
| Firepicker | | - | | |
| FlashFirebug | | - | | |
| Flashbug | | - | | |
| Flashlight | | - | | |
| Font Finder | | - | | |
| Font Finder(737353) | | - | | |
| Font Inspector | | - | | |
| Fontface Ninja | | - | | |
| Force CORS | | - | | |
| Foxy Detective | | - | | |
| Foxy SEO Tool | | - | | |
| Fresh CSS | | - | | |
| Fresh Dom Tree View | | - | | |
| Generic CSS Loader 2 | | - | | |
| Good Website Inspector | | - | | |
| Graphical Timeline of Events | | - | | |
| GridFox | | - | | |
| HTML 5 Validator | | - | | |
| HTML Color Coder | | - | | |
| HTML Element Detector | | - | | |
| HTML Regex Data Extractor | | - | | |
| HTMLEditor | | - | | |
| HTTP Resource Test | | - | | |
| HackBar | | - | | |
| Holmsie | | - | | |
| Html Validator | | - | | |
| HttpRequester | | - | | |
| IE NetRenderer | | - | | |
| Image Map Editor | | - | | |
| Image Spider | | - | | |
| ImageExchange | | - | | |
| IndexedDB Browser | | - | | |
| Inline Code Finder | | - | | |
| Inline Code Finder for Firebug | | - | | |
| Input Colourer | |
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