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10 Add-Ons You Have to Know About For Google Chrome. Useful Firefox Add-Ons for Designers and Developers. One of the many compelling reasons why Mozilla Firefox is by far the most used browser by web developers and designers is it’s variety of Add-Ons that come free, can be easily integrated and used right from the browser.

Useful Firefox Add-Ons for Designers and Developers

Mozilla has a complete section for all kinds of Add-Ons available at Firefox Add-Ons page. There are some must have Add-Ons that every web developer should have no matter what. Then there are a few essential Add-Ons for web masters to monitor and optimize their web pages and then there are other "icing on the cake" Add-Ons that you will love to play with. Starting with the essential Web Developer Add-Ons, here is the list: 1. This is definitely a prized possession for every web developer. 2.

The name says it all. 3. FireBug is yet another must have for web developers to monitor the performance of each element of their webpages live within the browser. 4. 5. 6. The name says it all. 7. 8. This is yet another Ad-On that is targeted for Firebug users. Setting up an extension development environment - MDC. This article gives suggestions on how to set up your Mozilla application for extension development.

Setting up an extension development environment - MDC

Unless otherwise specified, these suggestions apply to both Firefox and Thunderbird as well as SeaMonkey version 2.0 and above. Overview Create a development user profile to run your development firefox session; with special development preferences in about:config. Install some Firefox development extensions to your dev profile. Edit files in the extensions folder of your profile and restart the application with the dev profile. Development profile To avoid performance degradation from development-related prefs and extensions, and to avoid losing your personal data, you can use a separate profile for development work. You can run two instances of Thunderbird or Firefox at the same time by using separate profiles and starting the application with the -no-remote parameter.

On Ubuntu (and many other Linux distributions): /usr/bin/firefox -no-remote -P dev On some other distributions of Linux/Unix: Extensions - MDC. Modify and extend Mozilla applications Add-ons add new functionality to Gecko-based applications such as Firefox, SeaMonkey and Thunderbird.

Extensions - MDC

There are two main types of add-on: Extensions add new features to the application, while Themes modify the application's user interface. For both extensions and themes, Mozilla operates a repository at, also known as AMO. When you submit add-ons to AMO they are reviewed, and after passing review they are made available to users. You don't have to submit add-ons to AMO, but if you do, users can take confidence in the fact that they have been reviewed, and you can benefit from AMO's visibility as a source for useful add-ons. Add-ons can greatly affect the behaviour of the application that hosts them. Extensions Extensions add new functionality to Mozilla applications such as Firefox and Thunderbird. Add-on SDK extensions Develop restartless extensions using a set of high-level JavaScript APIs. Good practices Performance Security Themes. Extension Packaging - MDC. There are three different techniques you can use to build extensions: Add-on SDK-based extensions, manually bootstrapped restartless extensions, and overlay extensions.

Extension Packaging - MDC

Add-on SDK extensions Develop restartless extensions using a set of high-level JavaScript APIs. Restartless extensions Develop extensions that don't require a browser restart. Overlay extensions Develop traditional extensions using a XUL overlay. Extensions are a form of Installable Bundle which can be downloaded and installed by a user, or provided pre-packaged with an application or by an external program. Extensions use a directory structure which can provide chrome, components, and other files to extend the functionality of a XUL program. Every extension must provide an install.rdf file which contains metadata about the extension, such as its unique ID, version, author, and compatibility information. Note: Starting in Gecko 2.0, XPI files are no longer unpacked when extensions are installed. Making an extension XPI.