Firefox

Firefox Plugins

 * HTTPS Everywhere - encrypts your communications with many major websites, making your browsing more secure
 * Scrapbook - save web pages offline and organize them. Useful when on the way without internet connection.
 * Tree Style Tab - moves the tabs on the left side. Much easier to navigate.
 * Restart Firefox - adds File->Restart.
 * Flash Aid - fixes Adobe Flash problems.
 * Rss Icon in Awesomebar - adds the rss icon
 * Video DownloadHelper - download videos from youtube and convert them.
 * Shareaholic - share interesting links using Facebook, Twitter, Google Mail, Reader, Bookmarks, Evernote, Bitly, StumbleUpon, and more.
 * Boomerang for Gmail - Send an email later, follow up reminders, remind you if you don't hear back.
 * Wired-Marker - highlight website texts, you can define your own shortcut from the properties of every color.