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від Dan Moorehead | PowerAccess (PowerAccess.net) за Червень 19, 2017 · постійне посилання

Button's aren't available to add to App menu or toolbars, at least with Firefox Developer Edition (v55 x64) with e10s Multi-Process enabled. Installing both the ProfileSwitcher and Profile Folder Button extensions are collectively an alternative that does work with e10s, however.