use SeoQuake and you won't be able to use Google Rated 1 out of 5 stars
UPDATE: Something is rotten in the land of mozilla addons. Who removed my review from few days ago? Maybe database crashed, and they had to recover the backup?
Usability and functionality of seoquake are really nice, but Google got me blocked from using Google Search after I searched for few phrases on Google (as for each search, addon does additional 2xNumberOfResults queries on Google, and similar on Yahoo...). I wish seoquake was using official API's for getting info instead of page scraping.
ANOTHER UPDATE: above review by me remained due to the bug in mozilla review system.