Use Firefox Plugins to Enhance Your Internet Browser.
When Firefox addons are concerned, one of the most difficult tasks is to pick only 7, or 10, or 20 Firefox addons to list because there are so many useful extensions to the Firefox browser. Even when the choice is narrowed – i.e. Firefox addons for webmasters – still the choice is overwhelming and it is hard to pick only a handful of them. The task is much easier with Chrome extensions because there aren’t that many of them.
The Web Developer addon for Firefox is probably the most useful one for a webmaster. This addon allows to view and edit many components of a site directly from the browser. The Web Developer Firefox addon offers many CSS related features, including the ability to disable styles for the site one is currently viewing.
If one is not familiar with the number of sites, which are not done professionally and which can be viewed only in Internet Explorer, it might be strange why the IE Tab Firefox addon made it in this list. However, since many sites can be viewed in IE and nothing else, the IE Tab Firefox addon comes very handy because it allows (without leaving Firefox itself) to view a site the way it will be displayed in Internet Explorer.
HttpFox is very useful for troubleshooting. HttpFox monitors and analyzes the HTTP traffic (both incoming and outgoing) between the browser and the web servers. This way it is possible to spot problems and/or to catch unauthorized traffic.
HTML is one of the things a webmaster most frequently works with. This is why a convenient and reliable HTML validator is a must. The HTML Validator for Firefox is a top choice because it allows to validate the HTML code of a page directly from the browser.
Firefox addons are really numerous and there are so many useful extensions that it is not possible to list them all. The 7 Firefox addons listed in this article are just a small fraction of the tens of great Firefox extensions a webmaster can download and use on a daily basis.