Collections is an essentially an awesome way of grouping a bunch of add-ons for Firefox. You can then subscribe to these “Collections” and manage them using the “Add-on Collector” add-on for Firefox.

You can make your own collection or select one that’s already made filled with the add-ons of the author’s choice.

This is going to make installing all those add-ons on a fresh copy of Firefox just that much easier. You can use this for your own personal installation(s) of Firefox, but think also of the Sys Admins here, they can make a collection of default add-ons that they want all users in the organisation to have installed – handy, I think so.

At the moment you need a Mozilla account (you can register for free) to create collections and subscribe to them, you do not need an account to browse through the publicly available collections and download the add-ons within.

Naturally I couldn’t resist and I made a collection of Web Dev add-ons that I frequently use.

This extension comes shortly after the announcement that Sitepoint have put up their JavaScript Reference.

The new extension pulls in information from their reference, at the moment it only works for the HTML and CSS reference, but once the JavaScript reference is more complete we might see that integrated as well.

FireScope is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS. The extension’s core functionality is centered around a new Reference panel, which contains a search tool for looking up HTML elements, attributes, and CSS properties. The extension also hooks into context-menus in the HTML and CSS panels, the DOM crumbtrail, and the Inspector, adding options to look up a selected item ie. search for it in the Reference panel or to view a code example.

At first glance, this little addition to Firebug/Firefox doesn’t strike one as more than just a gimmick, but it’s usefulness soon becomes apparent when trying to find out more about a CSS property or HTML element.

All in all most of us who are hardcore HTML and CSS programmers won’t always find the reference that fantastic, but it’s of course for those little used elements and properties where the reference is useful (when was the last time you used the CSS clip property? Anyone?).

One of the more useful things I’ve already become fan of, is the browser support table shown for elements and properties. This allows you to quickly see if there is a buggy implementation, or perhaps only partial support in certain browsers for whatever it is you’re trying to do.

But tweak the right settings and you could make it faster still, more than doubling your speed in some situations, all for about five minutes work and for the cost of precisely nothing at all. Here’s what you need to do.

8 hacks to make Firefox ridiculously fast | News | TechRadar UK.