Agent 2.19.3

fixedFixed Announcements now produce both guideSeen and guideAdvanced events

fixedFixed Guides created in the visual designer render text correctly in old versions of Firefox (As Firefox is an evergreen browser, this is limited to point-of-sale devices, or other specific environments that do not typically receive software updates)

fixedFixed Better height calculations for banner guides created in the visual designer when a body tag has `position: absolute`