Firefox extension

Windows Resizer
https://addons.mozilla.org/en-US/firefox/addon/1985

Firebug
https://addons.mozilla.org/en-US/firefox/addon/1843

WebIDE
http://www.ithome.com.tw/news/88890

HttpFox: An HTTP analyzer addon for Firefox
https://addons.mozilla.org/en-US/firefox/addon/6647

CSSViewer
https://addons.mozilla.org/en-US/firefox/addon/2104

Web Developer
https://addons.mozilla.org/en-US/firefox/addon/60

NoScript
https://addons.mozilla.org/en-US/firefox/addon/722

ScribeFire Blog + HTML Editor
https://addons.mozilla.org/en-US/firefox/addon/1730

FireShot
http://screenshot-program.com/fireshot/

Project Naptha 讓圖片裡的文字可被複製、選取（Chrome 擴充功能）
http://free.com.tw/project-naptha/