Earlier quoted context omitted.
I've stopped relying on Google to give me reference documentation on searching the function/library name. I generally go directly to the API reference and do the search there because Google results might not even have it on the first few pages. I actually get annoyed at being pointed at the StackOverflow question that shares a few keywords with my search, but is completely unrelated otherwise.
That is similar to my approach, though I will download the documentation if it is available that way. It is always available, you know which version of the documentation you're using, and I never understood why an intermediary should be involved when something is referenced frequently. (Yes, I realize the latter is a personal quirk.) As for StackOverflow results, at least there is a chance that they will be more usef…
I guess it's time to start bookmarking those /usr/share/docs/... paths again :)