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Firefox 140 Brings Tab Unload, Custom Search & New ESR
(www.omgubuntu.co.uk)
This is a most excellent place for technology news and articles.
Am I misremembering things, didn't this feature exist already in the past?
Sort of. I believe search engine providers actually have to create an extension to be listed in the setting.
No I distinctly remember being able to right click and add a keyword and bookmark for search field on random website forms, even internal ones on company intranet sites and such