Sidebar Settings
Theme settings are accessible via the
about:config
page. Typeultima
oruser.theme
to get started.
ultima.sidebar.autohide
Tthis setting will show/hide all sidebars (not vertical tabs) when hovered
ultima.sidebery.autohide
Tthis setting will show/hide Sidebery when hovered (other sidebars will remain a static width)
ultima.tabs.vertical.hide (hiding the vertical tab bar)
ultima.tabs.vertical.hide
will hide vertical tabs completely (great for Sidebery setups)
- when combined with
ultima.tabs.vertical.hide.in.screencorner
, vertical tabs will be hidden at the bottom corner of the screen - or combined with
ultima.tabs.vertical.hide.in.screenedge
, vertical tabs will be hidden in the screen edge
For stability, ultima.tabs.vertical.hide
is reliant on ExpandonHover being ON
. This allows a consistent experience across the browser, whether in private browsing, or a different OS.
If you're interested in a Sidebery configuration be sure to check out the documentation here
ultima.sidebar.revamped.hide.when.horizontal
When on
, this setting will completely remove the extra sidebar when using horizontal tabs. When off
, it keeps the revamped sidebar visible even when using Horizontal Tabs.

ultima.sidebar.seperator
This setting seperates the vertical tab bar and sidebar to opposite sides of the browser
ultima.sidebery.expandon.inactive.windows
When using sidebery autohide, this setting will keep the sidebar expanded when the browser window is inactive (not in focus)
user.theme.xtension.sidebery
This setting allows Sidebery to automatically adapt to Color Scheme colors
Learn more about this in the Sidebery configuration docs, here
ultima.sidebar.hide.header
This setting hides the sidebar header
ultima.sidebar.revamped.hide.when.horizontal
Hides the new revamped sidebar when using horizontal tabs