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Text field: autocompletion: a menu with a history of typed phrases

Firefox Search suggestions
Graham Perrin
Graham Perrin

In some multi-line text fields:

  • when I begin typing, a menu drops down or pops up.

Each menu option is a previously-typed phrase, not necessarily recent.

Is this a hidden feature of Firefox?

It's very recently evident with at least three websites:

Reproducible with multiple Firefox profiles. Also evident with Firefox in safe mode.

Not evident with Microsoft Edge.

At a glance, I don't see anything relevant in release notes – https://www.firefox.com/en-GB/firefox/154.0/releasenotes/

It's possible that the feature was inadvertently enabled in response to an unknown combination of keys (shortcuts) as described in Mastodon.

In some multi-line text fields: * when I begin typing, a menu drops down or pops up. Each menu option is a previously-typed phrase, not necessarily recent. Is this a hidden feature of Firefox? It's very recently evident with at least three websites: * old Reddit, pictured at https://mastodon.bsd.cafe/@grahamperrin/117120940452711262 * Mastodon, pictured here and at https://mastodon.bsd.cafe/@grahamperrin/117124332180878790 * here – support.mozilla.org – when I began typing. Reproducible with multiple Firefox profiles. Also evident with Firefox in safe mode. Not evident with Microsoft Edge. At a glance, I don't see anything relevant in release notes – https://www.firefox.com/en-GB/firefox/154.0/releasenotes/ It's possible that the feature was inadvertently enabled in response to an unknown combination of keys (shortcuts) as described in Mastodon.
Attached screenshots

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