I’m using the scripts [Userscript] Niai 似合い Visually Similar Kanji and [Userscript] ConfusionGuesser
First one add a pretty good list of visual similar kanji to a kanji info page. The second one trigger during review when entering a wrong answer to tell us which kanji or vocab we may had in mind (because sometimes we are confused between a few kanji but we don’t know it yet)