Web Development

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JSONView No Restart

View JSON documents in the browser.

Rated 5 out of 5 stars (160)
107,686 users

Nimbus Screen Capture - editable screenshots No Restart Featured

1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
Edit screenshots and save the images to either local file or Google Drive. Annotate screenshots in a very user-friendly interface with different tools. Upload and share!

Rated 5 out of 5 stars (257)
125,033 users

JS Print Setup

Client side Javascript printer settings.
This extension implements print setup from CS Javascript, similar of MeadCo's ScriptX ActiveX control for Internet Explorer.

Rated 5 out of 5 stars (25)
52,536 users

All About Location Bar

Make URL modification an accurate, smooth and simple experience

Rated 5 out of 5 stars (17)
312 users

FillForms

FillForm is a small extension to help you fill page forms.
Fill out current web all forms with a keyboard shortcut(Alt + Q).

Rated 5 out of 5 stars (32)
2,897 users

Firebug No Restart Featured

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Rated 5 out of 5 stars (1,829)
2,045,421 users

FlashDisable No Restart

Toolbar button that lets you disable and re-enable Flash with just one click.

Rated 5 out of 5 stars (49)
24,058 users

LinkSidebar

View, search and test hyperlinks in a web page.

Perform group actions on multiple links like opening in tabs, copying link locations or testing to determine response times. Allows you to search/sort links and highlight their position on the webpage.

Rated 5 out of 5 stars (15)
1,609 users

Remote XUL Manager No Restart

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Rated 5 out of 5 stars (36)
72,180 users

CoLT

CoLT (short for "Copy Link Text") makes it easy to copy either a link's text, or both the link text and its URL in a format you specify. This non-invasive extension simply appears as context menu items when you right-click a link. Fully customizable!

Rated 5 out of 5 stars (97)
6,004 users

Free OmniGraffle (.graffle) Viewer No Restart

Open your OmniGraffle files for free

Rated 5 out of 5 stars (9)
258 users

JSON-DataView

Displays JSON data in a collapsible tree structure with syntax highlights.

Rated 5 out of 5 stars (9)
1,252 users

GitHub Extension Installer No Restart

Install Browser Extensions straight from GitHub Repositories

Rated 5 out of 5 stars (9)
2,825 users

Fusebox 5 Reload

This extension (for Firefox 1.5 - 3.0) adds a menu item to the context menu (right-click) and the Tools menu to rebuild the Fusebox 5 memory structure and reparse the XML files. It includes the new (in Fusebox 5) options to loadclean and parseall. Yo...

Rated 5 out of 5 stars (17)
101 users

StyleSheet Chooser Plus

StyleSheet Chooser Plus (aka SSCP) persists choice of website stylesheets.

Rated 5 out of 5 stars (17)
82 users

HideScrollbars No Restart

"Hide Scrollbars" add-on removes scrollbars for those who prefer mouse wheel and keyboard navigation.

Rated 5 out of 5 stars (16)
2,916 users

View formatted source (format source extension)

Displays formatted and color-coded source and optional CSS information for each element. ...

Rated 5 out of 5 stars (22)
176 users

Ghostery No Restart Featured

Increase your browsing privacy, protection, and speed.

Rated 5 out of 5 stars (1,263)
1,424,510 users

Element Properties

Returns the 'Properties' menu item that was removed in Firefox 3.6 to the context menu.

Rated 5 out of 5 stars (116)
4,631 users

Web Developer Featured

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (235)
465,920 users