1. AdThwart - Block ads using the Firefox AdBlock extention filter engine.
2. Chromelicious - Easy access to Delicious bookmarks and tags.
3. Google Mail Checker Plus - Display the number of unreaded messages in Gmail.
4. Google Reader Notifier - Display the number of unreaded feed in Google Reader.
5. Nightly Chrome Updater - Keep updated about lastest changes in Chromium Browser.
6. RSS Subscription Extension (by Google)
7. Smooth Scroll - Scrolls the websites smoothly.
8. Xmarks Bookmarks Sync - Backup and Sync bookmarks
9. Windows Live Mail - Cleaner Look - Remove ads and change look to minimal for Windows Live Mail.
* i wrote the list for reminds myself about what most extensions i’ve used.
Paste this command in Run window to enable Task Manager in Windows XP