(The following information was obtained from Google's Help - Getting Started Page)
Toolbar offers helpful search suggestions as you type in the search box. While most suggestions come from popular Google searches, you'll also see suggestions from your Google bookmarks and your search history. Toolbar even lets you know if you've incorrectly spelled a word, and suggests the correct spelling.
Download Google Toolbar - for Firefox Click here
Search with popular suggestions
Toolbar offers helpful search suggestions as you type in the search box. While most suggestions come from popular Google searches, you'll also see suggestions from your Google bookmarks and your search history. Toolbar even lets you know if you've incorrectly spelled a word, and suggests the correct spelling.Learn more about the search box
Access websites with a single click
Add custom buttons to access or search your favorite websites from Toolbar. You can add buttons created by other Toolbar users from our Button Gallery, or make your own using our Google Toolbar API.Learn more about custom buttons
Contribute to any webpage with Sidewiki
Google Sidewiki is a browser sidebar that lets you contribute and read helpful information alongside any webpage. Share your insights with the entire Sidewiki community and post updates via Blogger, Twitter, Facebook, or email.Learn more about Sidewiki
View your Google Bookmarks from any computer
Instead of remembering the addresses to all your favorite websites, save time by creating Google Bookmarks. Google Bookmarks are saved to your Google Account and can be accessed from any computer through Toolbar's Bookmarks menu, the Google Bookmarks homepage, or your iGoogle homepage.Learn more about Google Bookmarks
Check your spelling
Click the Spell check button to check your spelling on emails and contact forms. Misspelled words turn red. Click misspelled words to choose from a list of suggested spellings. Corrected words turn green. When you're done, click the Spell check button again to turn off the feature.Learn more about Spell check
Translate websites into more than 40 languages
View instant translations for individual words by rolling your cursor over an English word, or automagically translate entire websites on-the-fly into more than 40 languages.Learn more about Translate
Complete forms with AutoFill
Save time by not typing your name, phone number, email, home and billing addresses each time you fill out forms. Instead, create an AutoFill profile to complete forms with a single click, and create multiple profiles for your work or home information.Learn more about AutoFill