setTimeout() on Window/Worker plus consistency fixes

[hamishwillee]

This updates Window.setTimeout() and WorkerGlobalScope.setTimeout() for trusted types, following the same approach as #42042

• More or less full docs in the windows method. There is a page header warning in the top and a security considerations section in the body.
• worker method has same top section, but description and examples are cross linked to window method docs. The header links to the security considerations in the window method topic.
• Examples do not cover the use of TT. We have pretty strong warnings up the top about using this feature at all, so I don't see we need to show TT use.

This also did some consistency fixes across both this and the setInterval methods so that they have the same name for the function param (func) and the arguments are referred to as param rather than args - which is consistent with the template for web apis.

There were a few layout change and improvements to the docs - these map the similar changes done previously for setInterval()

This is part of project being tracked in #41507

[github-actions]

Preview URLs (7 pages)

• /en-US/docs/Mozilla/Firefox/Releases/5/Updating_add-ons
• /en-US/docs/Mozilla/Firefox/Releases/56
• /en-US/docs/Web/API/Page_Visibility_API
• /en-US/docs/Web/API/Window/setInterval
• /en-US/docs/Web/API/Window/setTimeout
• /en-US/docs/Web/API/WorkerGlobalScope/setInterval
• /en-US/docs/Web/API/WorkerGlobalScope/setTimeout

External URLs (3)

URL: /en-US/docs/Mozilla/Firefox/Releases/56
Title: Firefox 56 release notes for developers

• https://bugzil.la/1378586 (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/Window/setTimeout
Title: Window: setTimeout() method

• https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html (1 time) (Note! This may be a new URL 👀)
• https://wiki.mozilla.org/Security/Tracking_protection (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-12-02 05:53:18)

[hamishwillee]

@pepelsbey Can you please review?