To install add-ons on Anki you must proceed as follows:
First, you will have to go to the Anki menu bar, select “Tools” then “Add-ons”.
You will then be redirected to a page from which you can click on “Get Add-ons”.
Thus, you’ll have to copy the add-on code that you would have previously found on the Anki main page.
By clicking on “OK”, Anki will notify you that the download is complete.
Finally you’ll have to click a second time on “OK” and you will be able to benefit from the add-on thus downloaded.