I have compiled a list of 7 portable editions of various web browsers for Windows 7, which you carry with you anywhere on your USB pen drive. You can take your bookmarks, extensions and saved passwords, etc together with you, where ever you go.
Portable Browsers for Windows 7 | 8

Maxthon Internet Browser software is a powerful tabbed browser with a highly customizable interface. It is based on the Internet Explorer browser engine which means that what works in the IE browser will work the same in Maxthon tabbed browser but with many additional efficient features.
A fast multi-window browser with Popup Stopper, Cleaner and Flash Ads Filter. It adds a batch of features and functionalities to Internet Explorer. Avant Browser application was designed to be one the fastest web browsers on the planet. It too is based on IE.
Mozilla Firefox®, Portable Edition is the popular Mozilla Firefox web browser bundled with a PortableApps.com Launcher as a portable app, so you can take your bookmarks, extensions and saved passwords with you.
It has the same features as a normal desktop version, surf the web, write emails, use IRC while having your contacts, bookmarks and settings with you – anytime and everywhere.
Chromium is the portable version of Google Chrome. All you have to do is unpack and run and all program settings are saved in ”Chrome” folder while user settings go in “Profile” folder.
It is an Open Source Portable Browser that can be stored and run directly from a USB device. QtWeb is available as a stand alone executable and leaves no traces behind (other than a downloads folder) on the machine it is being run from.
Green.
Green Browser is a free, skinnable, tabbed portable internet browser that looks and functions much like internet explorer. It makes for a simple alternative to portable firefox as well.
If you are looking for a portable browser to surf the web privately, see Browzar.
Have I missed any ? Please let us know.
You might want to also check out this link which talks alternate web browsers for your Windows computer, each offering a different set of features.
