Currently we drop:

• Browser bookmarks JSON (not currently used by Ladybird, but are used by SerenityOS Browser)
• Auto-play allowlist config
• Content Filter denylist config

All in share/Lagom/ladybird. When installed from a distribution package, these config files will be read-only by a regular user.

• Read per-user configuration files. We should copy these shipped default configs into the user's config directory on....

  • first launch?
  • any time or if they are not present
  • only if the user edits them through some custom UI (about:config?)
  • controlled by some flag that distros set if they want the default configs copied or not?

• Reconcile user config files with default config files

  • merge user config directories with the default configs?
  • override default configs with user configs?

• Import and export configuration files

  • provide a way to export user settings and preferences
  • provide a way to import user settings and preferences (from other browsers? or just ladybird's format?)