According to dolske and fryn, this is a regression. Have not tested platforms other than Mac to see if the problem shows up.
Similarly to bug 616010, the UI does not jitter if already wearing a persona.
Tested out on nightlies, works in 02-04 (847a825087f2) but fails in 02-05 (4574f9e56d49). The corresponding changeset: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=847a825087f2&tochange=4574f9e56d49
Luckily there are still tinderbox builds. Narrowed it down to the change: http://hg.mozilla.org/mozilla-central/rev/51f36c6a7d38 from bug 627328
Component: General → XUL
Product: Firefox → Core
QA Contact: general → xptoolkit.widgets
Summary: Tab bar moves into title bar and jitters when trying on a persona → When previewing personas, tab bar moves into title bar and jitters
Assignee: nobody → mars.martian+bugmail
From reading bug 627328, it seemed like a script runner was thought of but never used. Tested this out and it solves the problem on Mac, going to run try builds to check other platforms.
Attachment #511235 - Flags: review?(bzbarsky)
Should be a hardblocker IMO, the effect is nasty.
Attachment #511226 - Attachment description: Free recording of problem. → Mehdi's screen recording of the bug now in webm!
blocking2.0: ? → final+
Comment on attachment 511235 [details] [diff] [review] Patch v1, switched to using a script runner. r=me
Attachment #511235 - Flags: review?(bzbarsky) → review+
Flags: in-litmus? → in-testsuite?
Status: NEW → RESOLVED
Last Resolved: 8 years ago
Resolution: --- → FIXED
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