Add clonable to experimental features

[pepelsbey]

Description

• Adds clonable to experimental sections
• Cleans up empty titles

Motivation

To support Fx 122 release.

Related issues and pull requests

• [WebAPI] Add ShadowRoot::clonable #31108

[github-actions]

Preview URLs

• /en-US/docs/Mozilla/Firefox/Experimental_features
• /en-US/docs/Mozilla/Firefox/Releases/122

External URLs (2)

URL: /en-US/docs/Mozilla/Firefox/Releases/122
Title: Firefox 122 for developers

• https://bugzil.la/1868428 (1 time) (Note! This may be a new URL 👀)

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URL: /en-US/docs/Mozilla/Firefox/Experimental_features
Title: Experimental features in Firefox

• https://bugzil.la/1868428 (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2024-01-26 13:55:02)

[bsmth]

Looks good to me, thanks. Some minor non-blocking comments for you 👍🏻