I don't use voice assistants so I don't know if these are common, but some of the examples in the list of commands[0] are interesting.

>Ask about a webpage - Display or open information to the current page or website.

>Example - What are people saying about this page? (Opens Reddit comments for a specific webpage or article) - What did this page used to look like? (Shows page history in archive.org)

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>Giving commands nicknames (experimental) - Create names or shortcuts for actions.

> Example - Say "open new york times", then "Give that the name news" - news (will open nytimes.com)

[0] https://mozilla-extensions.github.io/firefox-voice/lexicon.h...