Add keyboard shortcut for toggling entire toolbars (aka presentation mode in Chrome)

[abc10]

Some proposed solutions: https://superuser.com/questions/977912/firefox-hide-everything-except-content-area-of-the-browser

[Jon]

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[abc10]

Could be as in MS Edge, e.g. for mac:

command + control + F --> toggle full-screen (window)

command + shift + F --> toggle tab + url + bookmark i.e. entire toolbar (with command above = true full-screen)