Before installing yahoo toolbar. If I type google keyword tool in main Navigational toolbar. I will land on google adwords keyword tool page directly.
But installing Yahoo toolbar, I was not able to land on google adwords keyword tool directly.
So, Now i removed yahoo tool bar and restarted. Cleared cookies etc. But even now I was not able to land on google adwords keyword tool directly, after typing google keyword tool in main Navigational toolbar.
You might want to verify that that your about:config setting for "browser.search.selectedEngine" is still defined and set to "Google". Uninstalling the Yahoo! toolbar may have re-set it or deleted it.
Type "about:config" into the address bar, then type "browser.search.selectedEngine" into the search box at the top of the displayed config list, and make sure that that setting exists and says "Google". If not, you can add it as a new "name" by right-clicking on any other entry in the list.