Bug 874847 - Fix intermittent failure in browser_lastAccessedTab.js by including some fudge in the Date.now comparison. r=ttaubert
Bug 907755 - Followups, r=fitzgen
merge m-c to fx-team
Bug 906462 - Remove noise backgrounds for about:newtab and about:home; r=dao

--HG--
rename : browser/themes/linux/newtab/noise.png => browser/themes/linux/devtools/noise.png
rename : browser/themes/osx/newtab/noise.png => browser/themes/osx/devtools/noise.png
rename : browser/themes/windows/newtab/noise.png => browser/themes/windows/devtools/noise.png
Bug 586153 - Avoid tab panel ID collisions by using a monotonic counter; r=dolske