Strava is the most famous platform for tracking running and cycling activities. Unlike others, the Apps are not providing a Dark Mode, they're just ignoring it for years. With this userstyle now you can apply it.
Status Feb 2022: THIS IS WORK IN PROGRESS!
- Install the browser extension Stylus for Chrome, Firefox, Opera or Cascadea for Safari to apply this style.
- Apply it here: strava-dark-mode.user.css.
With a so-called user styles, you can override the styles from the origin page within your browser. You are a single click away, to apply the Focus Mode to your Facebook.
TBA
If you want to report a bug or you have a feature request instead, fill an issue.