Triple-click vs. Double-click

Don't have a direct solution, but my techniques for selecting all text:

1. Hold click at start of text field and drag down
2. Hold click at end of text field and drag up
3. Click in text field and do a cmd+a to select all, I mean you're likely going to be using the keyboard anyways.

These tend to be just as easy as double clicking.

 

I would also like a single click to select all in Safari. You can click on the icon to the left to single click select everything though.

 

Try pressing command+L to select the address bar, then tab once to the search field. Presto, selected without using the mouse at all. Alternatively, you could just use Keywurl.