User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0 Build ID: 20130409194949 Steps to reproduce: Use Firefox in 2880 x 1800 screen resolution. Actual results: Several UI elements (close tab buttons, new tab button, favorite star, and search magnifying glass) were not scaled. Very tiny buttons. Expected results: These elements should have been scaled.

I am using windows 7 64 Bit through bootcamp on macbook pro retina 15 inch.

Could you try Nightly Firefox 23 to confirm if it's fixed or not, please. See http://nightly.mozilla.org/

Totally a dupe of Bug 844604

(In reply to Loic from comment #2) > Could you try Nightly Firefox 23 to confirm if it's fixed or not, please. > See http://nightly.mozilla.org/ The UI appears identical; same tiny buttons.

Worksforme in latest Nightly and Aurora builds. Tested 2880x1800 192DPI win7. Can you replicate on Nightly with a fresh profile and addons disabled? What resolution/DPI scale settings are you using in Windows?

(In reply to Greg Edwards from comment #5) > Worksforme in latest Nightly and Aurora builds. Tested 2880x1800 192DPI win7. > > Can you replicate on Nightly with a fresh profile and addons disabled? > What resolution/DPI scale settings are you using in Windows? I apologize for the late response, was busy with a lot of work. I did as you said and it works now! everything is scaled perfectly! Thank you so much for your advice. Really appreciate it.

Closing as per comment 3.