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5 Add-ons in this Collection

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 336 reviews

166 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 216 reviews

42 users

View HTTP headers of a page and while browsing.

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 78 reviews

14,171 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Mozilla Labs - Jetpack Prototype by Mozilla Labs

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Experimental

Rated 4 out of 5 stars 27 reviews

0 users

Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.

WikiLook by TestPilot, Rasha

Rated 4 out of 5 stars 130 reviews

0 users

Leading dictionary lookup add-on. Fast, light, open source tool that define words for you without need to open new tabs or windows. Wiktionary&Wikipedia.

Ctrl or Shift or Alt + RightMouseButton click. Now with thesaurus.

70+ languages supported!

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