1. cssstylesheet api: `cssstylesheet()` constructor: `options.baseurl` parameter

2. css property: content: `url()`

3. css property: cursor: `url()`

4. css property: cursor: `url()` positioning syntax

5. css property: offset-path: `<url>`

6. types: `url()`

7. types: `url()`: `cross-origin()` modifier

8. types: `url()`: `integrity()` modifier

9. types: `url()`: `referrer-policy()` modifier

10. data url scheme: css files