Advanced customization

CSS, clipSub, new tab URL, inject list

User-defined CSS

Style HUD, hints, and vomnibar within supported scopes. Prefer small overrides; large CSS can fight dark mode. Options → Look / CSS fields; wiki User-defined CSS.

Clipboard substitution (clipSub)

Sed-like rewrite rules for copy/paste text (research and ticket workflows). Misconfigured rules can mangle passwords — keep rules narrow.

New tab URL

Controls what opens when Vim+ creates tabs. Chrome still owns Ctrl/Cmd+T for the browser new tab page unless the user changes Chrome settings separately.

Inject into other extensions

Optional allow list of extension IDs plus web_accessible_resources patterns. Only enable if you understand the security tradeoff.

Vomnibar JSON

Advanced geometry and matching: maxMatches, queryInterval, sizes, styles. Invalid JSON may fall back to defaults — check Options validation messages.

Sync

Chrome sync for settings is opt-in. Large CSS or map blobs may hit sync quotas; keep a local export.