Settings

derp's settings live inside Firefox's own Settings page.

What lives there

Anything derp adds is configured in Settings alongside Firefox's own panes: Tab & Appearance, Workspaces, the panel sidebar, mouse gestures and keyboard shortcuts. Importing workspaces from Vivaldi is there too, under Workspaces.

Open it from the menu or by going to about:preferences. One page, one search box — derp categories sit above Firefox's in the sidebar.