Superposition has browser addons for Chrome and Firefox. With them you can quickly open the current page in Superposition, or right click any link and send it to Superposition.
Our plugin for Adobe XD Lets you use the design tokens from inside Superposition directly in Adobe XD using our Panel plugin. Select any object and the applicable tokens will be shown, like colors and typography. Clicking on them automatically applies them to your selection.
The plugins for Sketch and Figma are coming soon!