Missing Widgets options (Allow Firefox to improve features enabled)

Hi! I'm trying to use Widgets in the Home page, but I can't find the option to enable them. Following [[https://support.mozilla.org/en-US/questions/1588060|a previous solved question]], I checked that I have the "Allow Firefox to improve features, performance, and stability between updates" option enabled, have restarted and updated Firefox, but I still can't find the option. Should I check for other configurations?