Desenvolvimento da Web

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Quick Locale Switcher

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Avaliado em 3 de 5 estrelas (82)
256.704 utilizadores

ColorfulTabs Em destaque

The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface. For Seamonkey & Flock. An essential. F...

Avaliado em 4 de 5 estrelas (969)
255.182 utilizadores

Awesome Screenshot Plus - Capture, Annotate & More Sem reínicio

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!

Avaliado em 4 de 5 estrelas (1.051)
221.376 utilizadores

SQLite Manager

Manage any SQLite database on your computer.

Avaliado em 5 de 5 estrelas (30)
215.681 utilizadores

Live HTTP Headers

View HTTP headers of a page and while browsing.

Avaliado em 4 de 5 estrelas (154)
199.151 utilizadores

Text Link

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

Avaliado em 4 de 5 estrelas (273)
197.834 utilizadores

Image Zoom

Adds zoom and rotation functionality for images...

Avaliado em 4 de 5 estrelas (327)
188.835 utilizadores

MeasureIt

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Avaliado em 4 de 5 estrelas (327)
171.688 utilizadores

JavaScript Debugger

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Avaliado em 4 de 5 estrelas (48)
166.292 utilizadores

Modify Headers

Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.

Avaliado em 4 de 5 estrelas (70)
165.709 utilizadores

Clear Cache Button

Adds a clear cache toolbar button. After installing the extension, find the clear cache button in the toolbar customization...

Avaliado em 4 de 5 estrelas (128)
163.815 utilizadores

IE Tab +

Uma versão melhorada do IE Tab que permite usar o motor do IE dentro do Mozilla/Firefox.

Avaliado em 3 de 5 estrelas (82)
162.340 utilizadores

Screengrab (fix version) Em destaque

Screengrab! saves webpages as images.
0.98 released!
New features: upload to internet

Avaliado em 5 de 5 estrelas (240)
156.993 utilizadores

DOM Inspector

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.

Avaliado em 5 de 5 estrelas (60)
150.630 utilizadores

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.

Avaliado em 4 de 5 estrelas (76)
146.726 utilizadores

The Addon Bar (Restored) Sem reínicio Em destaque

Gives you a place to put all your add-on buttons without over-crowding the navigation bar.

Avaliado em 5 de 5 estrelas (261)
141.942 utilizadores

YSlow

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

Avaliado em 3 de 5 estrelas (181)
128.205 utilizadores

RequestPolicy Em destaque

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Avaliado em 4 de 5 estrelas (209)
128.142 utilizadores

Cookies Manager+

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Avaliado em 4 de 5 estrelas (70)
114.302 utilizadores

HttpFox

An HTTP analyzer addon for Firefox

Avaliado em 4 de 5 estrelas (159)
111.716 utilizadores