message manager or remote debugging protocol). Every time an extension needs to access the web page it must use one of the available inter-process communication channels (e.g. The add-on’s code will run in a different process (browser chrome process) from web page content (page content process) - see the diagram below. The main challenge (for many extensions) is solving communication problems between processes.

The e10s project introduces a great leap ahead in terms of security and performance, as well as putting more emphasis on the internal architecture of add-ons. The two major advantages of this model are security and performance. The goal of the Electrolysis project (“e10s” for short) is to run web content in a separate process from Firefox itself. This is important especially for upcoming multiprocess support in Firefox (also called Electrolysis or E10S). This direction allows simple use of available platform components. There are several reasons why having Firebug built on top of native developer tools in Firefox is an advantage - one of them is tight integration with the existing platform. This version represents the next generation of Firebug built on top of Firefox native developer tools.

Give power to designers & content creators, in a place where they currently feel they have little to none, by bringing design tool interactions and hotkeys to the browser.Firebug 3 alpha was announced couple of weeks ago. No waiting for developers to expose their legos, just go direct and edit the end state (regardless of framework) and execute/test an idea Make more decisions on the front end of your site/app (a11y, responsive, edge cases, etc) Design while DevTools simulates latency, i18n, media queries, platform constraints, CPUs, screensize, etc Design within the chaos: use production or prototypes and the odd states they produce, as artboards and design opportunities Nitpick layouts & content, in the real end environment, at any device size Inspect styles, spacing, distance, accessibility and alignment Edit or style any page, in any state, like it's an artboard Open source web design debug tools built with JavaScript: a FireBug for designers.

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