Brian Grinstead

This is the eighth edition of the XUL/XBL Replacement Newsletter. Since the last update there've been steps towards removing in-content XBL, flexbox performance improvements, and new chrome Custom Element capabilities.

This is the seventh edition of the XUL/XBL Replacement Newsletter. Since the last edition, we've gotten some tooling improvements, landed an experimental HTML browser window and removed a bunch of listbox code.

This is the sixth edition of the XUL/XBL Replacement Newsletter. A quick note before starting: in addition to the ongoing XBL work, there's been notable progress on other XUL projects. All of this work is interrelated enough that I think it makes sense to talk about it together, so I've updated the title to reflect that.

This is the fifth edition of the XBL Replacement Newsletter. Since the last update we've moved below 200 bindings, so we've removed just over one third of the bindings. We've also been making progress on in-content bindings and doing some cleanup that's been enabled by the work so far. The easiest way to follow along with this work is to watch the main meta bug.

This is the fourth edition of the XBL Replacement Newsletter. Since the last update we've continued to remove bindings and have been making progress on accessibility, autocomplete widgets, and migrating XBL to JS. The easiest way to follow along with this work is to watch the main meta bug.

This is the third edition of the XBL Replacement Newsletter. Since the last update, we’ve removed 27 bindings and have been preparing to migrate bindings to Custom Elements.

This is the second edition of the XBL Replacement Newsletter. Since the last update, we’ve continued to remove unused or unnecessary bindings and improved tooling to make it easier to keep track of the work and to help find candidates for removal.

This is the first edition of the XBL Replacement Newsletter. First, as a reminder about the project: we are planning to replace XBL in Firefox (see this blog post for more details). There are 4 main focus areas for the project this quarter, so I’ll have a quick update on each:

XBL (XML Binding Language) is a markup language used to define appearance and behavior for UI components in Firefox. The implementation of XBL and the set of implemented bindings are deeply ingrained into Firefox, and it's been an influence for Web Components specs like Shadow DOM.

User agent styles refer to the styles loaded by the default stylesheets within a browser. Firefox has some basic style rules that get applied to every page - for instance, links are blue and