Folded together the following revisions: Bug 1356920 - Remove all toolbar layout code from browser-tabsintitlebar. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7805 *** Bug 1356920 - Move TabsToolbar and toolbar-menubar into the titlebar, and put the titlebar into the navigator-toolbox. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7806 *** Bug 1356920 - Put a spacer in the menubar to push titlebar items to the end, and stop the menu from stretching vertically. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7822 *** Bug 1356920 - Adjust CSS rules for new XUL document structure. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7807 *** Bug 1356920 - Fix placement of tracking protection icon. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7808 *** Bug 1356920 - Get rid of the spacer before the window caption buttons now in the TabsToolbar. r=dao The spacer isn't necessary, since the tabbrowser-tabs node will flex to fill the available space anyways. Differential Revision: https://phabricator.services.mozilla.com/D7809 *** Bug 1356920 - Move movingtab attribute to navigator-toolbox to account for TabsToolbar not being a sibling of nav-bar anymore. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7810 *** Bug 1356920 - Hide the window caption buttons hbox if the native titlebar is being drawn. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7811 *** Bug 1356920 - Keep the macOS window caption buttons vertically centered when drag space is enabled. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7812 *** Bug 1356920 - Switch window caption XUL nodes from IDs to classes so that more than one can exist per doc. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7813 *** Bug 1356920 - Move titlebar items out into a preprocessed file to be included at build-time. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7814 *** Bug 1356920 - Reorganize TabsToolbar contents to force most items to the bottom of it. r=dao Differential Revision: https://phabricator.services.mozilla.com/D9669 *** Bug 1356920 - Update CSS to account for new DOM structure under TabsToolbar. r=dao Differential Revision: https://phabricator.services.mozilla.com/D9670 *** Bug 1356920 - Fix titlebar button rendering when using a lwtheme without the Windows compositor. r=dao Differential Revision: https://phabricator.services.mozilla.com/D9671 *** Bug 1356920 - Put an ordinal rule on the window caption buttons to help ensure they stay at the end of the toolbar. r=dao This is to ensure that the buttons are placed after the post-tabs titlebar placeholder. Differential Revision: https://phabricator.services.mozilla.com/D7815 *** Bug 1356920 - Stretch window caption buttons to fill vertical space on Windows 8+ when using extra drag space. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7817 *** Bug 1356920 - Update onViewToolbarsPopupShowing to search for toolbars that are grandchildren of the toolbox. r?jaws Differential Revision: https://phabricator.services.mozilla.com/D7818 *** Bug 1356920 - Hide the titlebar items in the TabsToolbar if the menubar is being displayed. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7825 *** Bug 1356920 - Fix selector for titlebar. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7826 *** Bug 1356920 - Fix titlebar themeing on Linux. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7828 *** Bug 1356920 - Remove browser-tabsintitlebar layout flushes from performance test whitelist. r?florian Differential Revision: https://phabricator.services.mozilla.com/D7829 *** Bug 1356920 - Fix bottom border of tabbar to account for new DOM structure. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7830 *** Bug 1356920 - Hide the titlebar-buttonbox-container when in fullscreen mode. r=dao Differential Revision: https://phabricator.services.mozilla.com/D7833