Update quickstart

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-## Configuration files
-Configuration is saved in:
-
-- on Linux, _~/.config/smolbote/smolbote.cfg_
-
 ## Keyboard shortcuts
 
 ### Navigation
+- F4 to focus the address bar and type an address; F2 show its menu
 - Ctrl + Left - go back
 - Ctrl + Right - go forward
 
 ### Tabs
 - Ctrl + T - new tab
+- Ctrl + X - close tab
 - Ctrl + O - previous tab
 - Ctrl + P - next tab
-- Ctrl + X - close tab
+
+### Subwindows
+A subwindows is a collection of tabs. It can be minimized, resized, moved,
+maximized, tiled (F9) and cascaded (F10) within the main window.
+
+- Ctrl + G - new subwindow
 - Ctrl + W - close subwindow
 
-See the [manual page][manpage] for more options.
+### Other
+- Ctrl + B - show/hide bookmarks
+- Ctrl + D - show/hide downloads
+
+## Profiles
+A Profile is a collection of settings, policies, scripts, cookies, cache and
+history. Profiles can be used to isolate pages from each other.
+
+Each window has a default profile it uses when opening new tabs. This can be
+changed from the window's menu. Additionally, tabs can have their profiles
+individually changed from their context menu.
+
+Because profiles store all their data separately, you can log in into the same
+site with a different account from each profile. However, links opened into new
+tabs will still use the subwindow's default profile. For example, you can set a
+profile to hold login information for a site, but all new tabs opened from that
+site would still be using the default off-the-record profile.
 
-[manpage]: /smolbote/manpage.html
+## Configuration files
+Configuration is saved in:
+
+- on Linux, _~/.config/smolbote/smolbote.cfg_