It was a mistake to implement these 2 as text attributes. They should be object attributes: See http://www.linuxfoundation.org/en/Accessibility/IAccessible2/ObjectAttributes

Roc mentioned that getComputedStyle can cause perf issues. Shouldn't we be asking the frame for info? We do have some major perf issues recently filed about text attributes, which used getComputedStyle.

(In reply to comment #2) > Roc mentioned that getComputedStyle can cause perf issues. Shouldn't we be > asking the frame for info? We do have some major perf issues recently filed > about text attributes, which used getComputedStyle. Yes but Roc said we shouldn't care until we get info it's really perf issue. These text attributes were calculated by getComputedStyle, so I don't change anything when I start to expose them as object attributes. Also I think real perf issue of text attributes is we navigate DOM tree every time for every text attribute.

Comment on attachment 344597 [details] [diff] [review] patch r=me for the test part.