Web Development

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Text Link

Allows URI texts written in webpages to be loaded by double clicks.

Rated 4 out of 5 stars (283)
166,050 users

IE View

Lets you load pages in IE with a single right-click, or mark certain sites to *always* load in IE.

Rated 3 out of 5 stars (152)
77,368 users

Site Information Tool

Provides information about a webpage (or website) including rankings, domain registration data (whois), IP information, server response and page data, thumbnail and more.

Rated 4 out of 5 stars (20)
2,341 users

Textise No Restart

Creates a text-only version of almost any web page. Great for accessibility, SEO and printing.

Rated 3 out of 5 stars (18)
2,363 users

Ghostery No Restart Featured

Protect your privacy. See who's tracking your web browsing and block them with Ghostery.

Rated 5 out of 5 stars (1,157)
1,388,334 users

Empty Cache Button Featured

Cache clearing made easy. One click.

Rated 4 out of 5 stars (84)
65,551 users

Link And Forminfo

Restore Linkinfo and FormInfo which has been deleted from PageInfo of Firefox3.

NOTE:
This extension does not seem to work on MAC.

Rated 5 out of 5 stars (23)
1,172 users

Colorific. No Restart

Colorize entire web pages manually or automatically. With 28 customizable themes that transform hue, saturation, lightness and opacity. For Firefox 28.0 and above. NEW: Copy themes and group color properties using drag-and-drop.

Rated 3 out of 5 stars (4)
1,574 users

Stylish Tools

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (1)
1,082 users

Transparent standalone images No Restart

This add-on renders standalone images on a transparent background, so you can see the image in all its glory!

Rated 5 out of 5 stars (37)
1,398 users

Webpage Screenshot in Firefox (♥♥♥♥♥)

FireShot Webpage Screenshots captures pages entirely. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

Rated 5 out of 5 stars (427)
260,289 users

RESTClient, a debugger for RESTful web services.

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Rated 4 out of 5 stars (81)
133,579 users

Context Font

Show the font of selected text in the context menu.

Rated 4 out of 5 stars (14)
3,848 users

Test Pilot

Help us make Firefox better by joining our structured user studies! No need to download this add-on if you are running Firefox 4 beta, - you are already a part of the team!

Rated 4 out of 5 stars (71)
756,230 users

SourceEditor

View and Edit source of HTML element...

Rated 3 out of 5 stars (20)
1,602 users

SQLite Manager

Manage any SQLite database on your computer.

Rated 5 out of 5 stars (34)
195,069 users

pwgen - Password Generator

For Sysadmins / Network Engineers / and why not everybody who needs a quick password generator.. simple, yet efficient.

Rated 5 out of 5 stars (43)
5,365 users

Whois & Flags Firefox & Websites Popularity Rating

Display Country Flag indicating Website Physical Location (Country, State, City). Website Popularity (Live Visitor Statistics). Shows how many users are visiting any World Website per day. Website IP IPv6 Addresses, DNS, Hosting. IP Whois Lookup

Rated 4 out of 5 stars (15)
3,084 users

WebDriver Element Locator No Restart

This addon is designed to support and speed up the creation of WebDriver scripts by easing the location of web elements.

Rated 5 out of 5 stars (10)
2,167 users

cliget No Restart

Download files using curl or wget. This addon generates curl/wget commands that emulate the request as though it's coming from your browser allowing you to download protected files directly to a separate machine (e.g. server).

Rated 5 out of 5 stars (45)
6,017 users