On AMO, when looking at a preview of a persona (hovering over it), the persona will occasionally flash and the tab strip will jump around.
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:8.0a1) Gecko/20110811 Firefox/8.0a1"
(In reply to Rob Campbell [:rc] (robcee) from comment #0)
> Possible regression?
It has always moved the tabs in tab-overflow if you are at the end of the tab-strip AFAIK.
The flashing isn't new either and seems to be more of a problem with where you are hovering on the preview. If you get towards the edge it flashes if you stay in the middle it is static.
Created attachment 552666 [details] [diff] [review]