Hi team, I noted that we don't have spec up-to-date for "abbr" and "acronym". https://html.spec.whatwg.org/multipage/rendering.html#phrasing-content-3 We are missing: abbr[title], acronym[title] { text-decoration: dotted underline; } In case, if I am not able to do it and had to close my PR, I will share details on genuine test failures or why this is no go at the moment for Webkit so someone else can take a look in future. Thanks!