Not sure what you mean by tool, but nightly WebKit builds are at http://nightly.webkit.org/. You could probably use cron and curl to build a tool.
System Preferences -> Keyboard and Mouse and select the tab Keyboard Shortcuts. On the bottom you will see a setting for “Full Keyboard Access”. Just set it to All Controls.
There's no great way to track this — virtually no way to track
installed base, for example. You can only really look at share of page
requests across a basket of sites — that's what NetApplications and
StatCounter do. Those are probably the best we have for most Western
countries. Gemius is best in Eastern Europe. There's one in Japan that I
forget, and a number of ways to track in China. Bottom line, though, is
that there's no very accurate way to track these — you can really only
get an idea of trending.
There is an active discussion on google forums about this issue: Google Groups. Although, if you only want to do that with pdf files, there is an extension for that – PDF Viewer.
Chrome definitely doesn't ignore the URL when you do a search. According to Peter Kasting who wrote this code, the relative weighting is URL prefix > page titles = in-page matches = matches in other parts of the URL. I have definitely experienced similar problems. The justification that Peter gives for the equal weighting of in-page and non-prefix URL matches –
"It's not really 'clear' that the page content is less memorable than the URL. If I read a story on the New York Times, it's likely that I never even paid attention to the URL, whereas the page content is much more memorable. Part of the reason (though not all) for the omnibox design is that the majority of users neither understand nor care about URLs."
I've tried to switch from Firefox to Chrome, but I can't, mainly because of:
- Print preview (http://www.google.com/support/fo…)
- Ubiquity (http://mozillalabs.com/ubiquity)
- FoxyTunes (http://www.foxytunes.com)
- All-in-One Gestures (https://addons.mozilla.org/en-US…)
- Opening a download without saving (http://www.google.com/support/fo…)
- Live Bookmarks (http://support.mozilla.com/en-US…)
(Of course, there are gesture plugins for Chrome, but I haven't found any that I like as much as All-in-One Gestures. I also like Forecastfox more than any Chrome equivalent I've found.)
The easiest way to do this is to use the Keywurl extension:
It doesn't yet for for Safari 4 on Snow Leopard but works for all other recent combinations of OS X / Safari versions.
I'm a Chrome diehard, but my Quora experience is best on Safari hands down. I can benchmark it if there's interest.
Less memory usage, Faster loading
Stability and Reliability
More useful add-ons.
And more publicity and collaborations with 3rd parties!
IE6 is still massively popular in Asia, especially in Korea and China, where many financial and government websites require IE6 due to heavy dependence on aging ActiveX components. 
If you want to support customers in Asia, you'll need to support IE6.