Dave Camp Mozilla’s Director of Engineering has this week announced via the Mozilla mailing list that the company is currently in the planning stage of redesigning and rebuilding the popular Mozilla Firefox browser user interface.
The new Mozilla Firefox interface will be rebuilt using modern web technology and techniques and was originally built on top of Mozilla’s XML User Interface Language (XUL).
Unfortunately the XUL web technology is beginning to show its age and is not as well use as it once was, setting the browser up for performance issues at a later date if the company does not proactively fix the issues before the technology becomes redundant. The Mozilla mailing list publication explains more:
Firefox is built on web technologies*, but we could do a much better job of
capitalizing on that. The first thread of discussion was around
deployment: since Firefox began, the industry has continually evolved how
it deploys code to users, and today it isn’t done on an 18-week cycle. We
think there are big wins to be had in shortening the time that new features
reaches users. Critical fixes should ship to users in minutes, not days.
Individual features rolling out to small audiences for focused and
multi-variate testing. As Laura Thomson put it in her Whistler
presentation – “The trains have served us well, but it’s time to build a
*The second thread was about removing that asterisk from “web
technologies”. Back in the early Mozilla days, XUL was our attempt to fill
the gaps HTML had at for building large-scale web applications. Over time,
the web – and app development for the web – has evolved its own set of
standards and technologies; we should follow it.
The web development community has addressed that need through HTML in a
number of interesting and novel ways that don’t rely on Mozilla-specific
technology. There’s a huge body of shared wisdom about how to build
applications on the web. It’s time to go back and examine how we can bring
that wisdom back into Firefox.
Because XUL and XBL aren’t web technologies, they don’t get the same
platform attention that HTML does (for good reason!). Performance problems
go unfixed and it creates a lot of unnecessary complexity within Gecko.
It’s harder for even experienced web developers to get up to speed. It’s
further from the web, and that doesn’t help anybody.
We intend to move Firefox away from XUL and XBL, but the discussion of how
to do that is in the early stages. There are a ton of unanswered
questions: what technologies/best practices for web development should we
adopt in its place? How does this affect add-on developers? Is there
space for a native-code main-window on desktop like we have on Android?
How much time should we spend on this vs. other quality issues? What
unanswered questions have we not asked yet?
Some of these questions are going to take a while to answer, and will
involve a bunch of concurrent discussions. If you start seeing discussion
of the “go faster” project, that’s talking about addressing our deployment
strategy. If you start seeing people using sometimes-excessively-violent
references to removing XUL/XBL from our codebase, this is the context in
which that discussion is happening. When you see these discussions –
including now – please join in.
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