Additional features, settings, or issues not covered by specific Microsoft Teams categories
@Brandi Stewart you are my hero!!!
Took me a while, but yes it works, but to clarify, it's not enough to make the Sharing toolbar appear, it's about clicking ON the toolbar (ie make it the active part of the window) then type Ctrl-W and it disappears.
(you said "bottom left-hand corner of the toolbar." - I find clicking the time clock on the Sharing Toolbar to be the most innocuous part to click to make it 'active'.
THANKS now I can see my Browser tabs without the Sharing toolbar obscuring them...