Mozilla Delivers Built-in HTML5 App Development Tool for Firefox
If you work with web content at all, you're probably familiar with doing debugging and content editing directly from within a browser. If you're a Firefox user, you may also be very familiar with tools such as Firebug, which lets you do extensive debugging and development from within Firefox.
Now, Mozilla has announced a new toolset to take these kinds of capabilities to the next level. Firefox Nightly release channel users can start testing WebIDE, a development environment for HTML5 apps built into Firefox.