Created attachment 8535576 [details] Left: default | Right: with "Restore"-button With HWA enabled, the Launcher at the bottom of about:home is a few pixels taller when the "Restore Previous Session"-button is shown. When it's clicked, the button is removed and the launcher is visibly shrinking, which is noticeable in that split-second about:home is still shown before loading the session. When HWA is disabled, the launcher has the same size with the "Restore"-button shown or not. Regression-range: Last good revision: e5f6caa40409 (2012-03-16) First bad revision: da5e8f6a44bd (2012-03-17) Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e5f6caa40409&tochange=da5e8f6a44bd Probably 6fc257a416cb Frank Yan — Bug 736512 - Followup to about:home refresh broke long labels. r=mak
I could reproduce with latest Nightly 38.0a1 2015-02-16, Win 7 64-bit.