Search Magic: the Gathering cards with Scryfall by using the context menu or the omnibox.
This extension has two ways for searching cards from Scryfall: by searching the selected text from the right-click menu or by starting to type "scry " in the address bar (aka the Omnibox).
Right-click: Select any text on any webpage, right-click, and select 'Search Scryfall for "..."'.
Address bar: type "scry" and then press space/tab, after this you can type in any card name and it will try to autocomplete it for you, or you can input more complex searches and it will show results from those. Choosing the first option will search for that in Scryfall and selecting any of the autocompletions will open that card in Scryfall.
Not affiliated with the people running Scryfall.