The CSS for Browser Chrome, in particular the width the Rocketbar, is currently very complex with lots of special cases. There are also weird side effects like a different width collapsed Rocketbar depending on the width of the expanded Rocketbar. I think we could simplify it a lot by using a flex layout, but we need to be very careful about harming performance.
Note: I previously started working on this in bug 1054778, but it became too risky for 2.1. We should revisit this for 2.2.
I'm working on a proof of concept, although I'm not sure if it's going to work http://people.mozilla.org/~bfrancis/flex_chrome/ The basic idea is that we use a simple flex layout for the resting expanded and collapsed states, and for the transition we temporarily pop out the URL bar into fixed positioning in order to transition it.
Browser chrome may change completely in v3, so unassigning myself until we know more.
Assignee: bfrancis → nobody
Firefox OS is not being worked on
Status: NEW → RESOLVED
Last Resolved: 5 months ago
Resolution: --- → WONTFIX
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