I use Google as my primary search engine. However, nowadays, more often than not, I tend to use Yahoo! Search too. After I search using Google and I’m not satisfied with the results, mind you. So, a Greasemonkey script that does this:

Notice the Yahoo! among the tabs. Simple. Useful. You may install the script from here.
Edit [11:58, 13/05/05]: One of the comments to Jeremy’s post mentions Butler—way more comprehensive, etc. I should look for stuff before I hack my own, ya know.
Works on Opera
(Anonymous)
2005-05-19 04:13 am (UTC)