HTML title text is hard to use on a mobile device. It would be better if the site implemented a method such as http://m.xkcd.com/ where tapping on the image shows what is normally shown in title text.

I appreciate that title-text can be made more accessible by developers (I imagine that applies to most visible-only-while-hovering menus too), but I'm looking for an option for clients. Like showing the title-text below the picture/link as a caption, or whatever Wikipedia's now doing for footnotes. Even a javascript command that I could make Scriptish run would help.

By the way, I like m.xkcd's method. But is there really no about:config entry to configure the amount of title-text shown?

There is no way to use about:config to show more title text.