How tor browser is different from other browsers?

TOR=The Onion Router.
1. Imagine a postcard1 containing the complete destination address which includes: name, house number, block, street, city, state, country.
2. Now, imagine another postcard2 containing all these information written with an invisible ink. One information can only be revealed at each level by a specific dye or solution by the postmaster, which allows it to get transmitted to the next level say the country-then state-then city and so on. This hides complete information at each level and yet allows the letter to get through without the knowledge of where it has come from at that level and the name of end recipient, thus providing anonymity to it.
Postcard1 is the normal browser, while postcard2 is a tor browser which provides anonymity to the users by:
a)encrypting information at each successive level like an onion peel
b)routing traffic through random IP addresses of thousands of tor volunteer servers worldwide.