Changes in 20210809093320

Built from a1a26ba25fbc5ffcfe850e7ead9eada89cfdfa7e

..index..
Bug 1678771 R[Core:Layout: Scrolling and Overflow]scrolling via touchpad in Library window is insanely over sensitive
Bug 1719070 R[Core:Networking: HTTP]Add Nimbus client code for "Firefox/100.0" UA string experiment
Bug 1724263 R[Core:Widget: Gtk]Crash in [@ InvalidArrayIndex_CRASH | mozilla::widget::ScreenGetterWayland::GetScreenForWindow]
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Changes to 3 bugs - 3 fixed.