PX to REM and REM to PX

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  Web Developer

  Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.

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  Dev extensions reload

  Reload enabled development extensions

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  JSON Lite

  Fast JSON viewer - highlights, shows items count/size, handles large files

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  Internet Speed Test

  Test your internet connection speed (upload and download) from a toolbar panel

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  Cookie-Editor

  Simple yet powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab.

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