Plugin by URL

If you want some plugins active only on a few specific pages, go to Custom URLs => Plugin by URL, and click on the pencil to set the URLs where you want those plugins.

Then those plugins will be deactivated everywhere but active when the specified URLs are matched.

Only the Custom URLs settings can override Active On Frontend. All the other settings will be overridden.

The picture below shows the settings to keep active Change Class In Viewport only on the About page.
Remember that if you want to match the homepage you need to write [home].

With the free version, you can set up to three plugins, while with the PRO version you have no limits