User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/46.0 Build ID: 20160421124000 Steps to reproduce: This is a follow-up to https://bugzilla.mozilla.org/show_bug.cgi?id=803633 for GTK3. With update to Firefox 46 (and consequently GTK3), the behavior of the scrollbar no longer follows the gtk-primary-button-warps-slider system (theme) setting. System is a Linux Mint Debian Edition 2, Cinnamon 2.80 or 3.0 (tested with both versions). GTK version is 3.14.5 While the theme I use not explicitely states gtk-primary-button-warps-slider = false, the desktop behavior is consistent with it, i. e. a click on the scrollbar with the primary button scrolls one page. Actual results: Firefox warps to the mouse position instead. Including the setting in ~/.themes/<mytheme>/gtk-3.0/settings.ini had no consequence. Expected results: Up to Firefox 45 clicking on the scrollbar had expected results.
[Settings] gtk-primary-button-warps-slider=false in ~/.config/gtk-3.0/settings.ini causes a primary click on the scrollbar trough scrolls one page in GTK+-3.16.7. I doubt this report describes a bug in Gecko.
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