Bugzilla

We'll probably want to differentiate between pinning/moving/right-click events in the horizontal tabstrip vs vertical tabstrip (BrowserUsageTelemetry handles UI interactions like this).

We'll want to differentiate between horizontal and vertical tabstrip events in BrowserUsageTelemetry. The events that DS is interested in is, although if there's anything else that could be useful for tab/tab context menu usage that would also be good:

tabs_context
tab_open_event_count
max_concurrent_tab_count
max_concurrent_tab_pinned_count
tab_pinned_event_count
all_tabs_panel_dragstart_tab_event_count
tabs_bar

We'll want to differentiate between horizontal and vertical tabstrip events in BrowserUsageTelemetry. The events that DS is interested in is, although if there's anything else that could be useful for tab/tab context menu usage that would also be good:

tabs_context
tab_open_event_count
max_concurrent_tab_count
max_concurrent_tab_pinned_count
tab_pinned_event_count

Edit: `tabs_bar` is the tabs-toolbar and we won't have that element in vertical tabs mode so we'll need to register a new one.