This is a bug filed for optimizing AccessibleTreeWalker and GetAccessibleFor. - When possible, accessible tree walking should avoid calling GetPrimaryFrameFor(). Mostly, it should try to avoid calling it much for text frames, which aren't normally in the frame map, and results in creation of new entries for the frame map. - Don't walk into hidden subtrees - Use IsContentOfType(), which is faster than a QI, to streamline GetAccessibleFor - Move special case code out of the main loop. 1) Move the check for <legend> so that it doesn't have to occur on every text node. 2) Move the check to see if a XUL menu is open into the xul menu code

*** This bug has been marked as a duplicate of 242589 ***